Revert "Use LinkedHashMap to get deterministic config order"

46 files changed, 114 insertions, 113 deletions

diff --git a/config-model/src/main/java/com/yahoo/config/model/graph/ModelNode.java b/config-model/src/main/java/com/yahoo/config/model/graph/ModelNode.java
index bbff0c26614..e22897903db 100644
--- a/config-model/src/main/java/com/yahoo/config/model/graph/ModelNode.java
+++ b/config-model/src/main/java/com/yahoo/config/model/graph/ModelNode.java
@@ -14,7 +14,7 @@ import java.lang.reflect.Type;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
@@ -33,7 +33,7 @@ public class ModelNode<MODEL extends ConfigModel> implements ConfigModelInstance
     final Class<MODEL> clazz;
     final Constructor<MODEL> constructor;
     final List<MODEL> instances = new ArrayList<>();
-    private final Map<ComponentId, ModelNode> dependencies = new LinkedHashMap<>();
+    private final Map<ComponentId, ModelNode> dependencies = new HashMap<>();
 
     public ModelNode(ConfigModelBuilder<MODEL> builder) {
         this.id = builder.getId();
diff --git a/config-model/src/main/java/com/yahoo/config/model/provision/InMemoryProvisioner.java b/config-model/src/main/java/com/yahoo/config/model/provision/InMemoryProvisioner.java
index f12b7697ef1..8bf6dc7f1d9 100644
--- a/config-model/src/main/java/com/yahoo/config/model/provision/InMemoryProvisioner.java
+++ b/config-model/src/main/java/com/yahoo/config/model/provision/InMemoryProvisioner.java
@@ -17,7 +17,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Comparator;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.ListIterator;
@@ -56,7 +56,7 @@ public class InMemoryProvisioner implements HostProvisioner {
     private final Map<ClusterSpec, List<HostSpec>> allocations = new LinkedHashMap<>();
 
     /** Indexes must be unique across all groups in a cluster */
-    private final Map<Pair<ClusterSpec.Type, ClusterSpec.Id>, Integer> nextIndexInCluster = new LinkedHashMap<>();
+    private final Map<Pair<ClusterSpec.Type, ClusterSpec.Id>, Integer> nextIndexInCluster = new HashMap<>();
 
     /** Use this index as start index for all clusters */
     private final int startIndexForClusters;
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/DocumentModelBuilder.java b/config-model/src/main/java/com/yahoo/searchdefinition/DocumentModelBuilder.java
index 6e1f428ee49..17d9bf635fa 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/DocumentModelBuilder.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/DocumentModelBuilder.java
@@ -30,7 +30,7 @@ import java.util.AbstractMap;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
@@ -369,8 +369,8 @@ public class DocumentModelBuilder {
     }
 
     private NewDocumentType convert(SDDocumentType sdoc) {
-        Map<AnnotationType, String> annotationInheritance = new LinkedHashMap<>();
-        Map<StructDataType, String> structInheritance = new LinkedHashMap<>();
+        Map<AnnotationType, String> annotationInheritance = new HashMap<>();
+        Map<StructDataType, String> structInheritance = new HashMap<>();
         NewDocumentType dt = new NewDocumentType(new NewDocumentType.Name(sdoc.getName()),
                                                  sdoc.getDocumentType().contentStruct(),
                                                  sdoc.getFieldSets(),
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/MapEvaluationTypeContext.java b/config-model/src/main/java/com/yahoo/searchdefinition/MapEvaluationTypeContext.java
index 2b60543f70d..fef7ff56763 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/MapEvaluationTypeContext.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/MapEvaluationTypeContext.java
@@ -19,7 +19,7 @@ import com.yahoo.tensor.evaluation.TypeContext;
 import java.util.ArrayDeque;
 import java.util.Collections;
 import java.util.Deque;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
@@ -41,9 +41,9 @@ public class MapEvaluationTypeContext extends FunctionReferenceContext implement
 
     private final Optional<MapEvaluationTypeContext> parent;
 
-    private final Map<Reference, TensorType> featureTypes = new LinkedHashMap<>();
+    private final Map<Reference, TensorType> featureTypes = new HashMap<>();
 
-    private final Map<Reference, TensorType> resolvedTypes = new LinkedHashMap<>();
+    private final Map<Reference, TensorType> resolvedTypes = new HashMap<>();
 
     /** To avoid re-resolving diamond-shaped dependencies */
     private final Map<Reference, TensorType> globallyResolvedTypes;
@@ -61,7 +61,7 @@ public class MapEvaluationTypeContext extends FunctionReferenceContext implement
         this.currentResolutionCallStack =  new ArrayDeque<>();
         this.queryFeaturesNotDeclared = new TreeSet<>();
         tensorsAreUsed = false;
-        globallyResolvedTypes = new LinkedHashMap<>();
+        globallyResolvedTypes = new HashMap<>();
     }
 
     private MapEvaluationTypeContext(Map<String, ExpressionFunction> functions,
@@ -325,7 +325,7 @@ public class MapEvaluationTypeContext extends FunctionReferenceContext implement
     /** Binds the given list of formal arguments to their actual values */
     private Map<String, String> bind(List<String> formalArguments,
                                      Arguments invocationArguments) {
-        Map<String, String> bindings = new LinkedHashMap<>(formalArguments.size());
+        Map<String, String> bindings = new HashMap<>(formalArguments.size());
         for (int i = 0; i < formalArguments.size(); i++) {
             String identifier = invocationArguments.expressions().get(i).toString();
             bindings.put(formalArguments.get(i), identifier);
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/OnnxModel.java b/config-model/src/main/java/com/yahoo/searchdefinition/OnnxModel.java
index 254b58ee991..4b849af9662 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/OnnxModel.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/OnnxModel.java
@@ -5,7 +5,7 @@ import com.yahoo.tensor.TensorType;
 import com.yahoo.vespa.model.ml.OnnxModelInfo;
 
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
@@ -18,8 +18,8 @@ import java.util.Optional;
 public class OnnxModel extends DistributableResource {
 
     private OnnxModelInfo modelInfo = null;
-    private final Map<String, String> inputMap = new LinkedHashMap<>();
-    private final Map<String, String> outputMap = new LinkedHashMap<>();
+    private final Map<String, String> inputMap = new HashMap<>();
+    private final Map<String, String> outputMap = new HashMap<>();
 
     private String  statelessExecutionMode = null;
     private Integer statelessInterOpThreads = null;
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/OnnxModels.java b/config-model/src/main/java/com/yahoo/searchdefinition/OnnxModels.java
index 7aad92ba01a..c9c12100552 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/OnnxModels.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/OnnxModels.java
@@ -4,7 +4,7 @@ package com.yahoo.searchdefinition;
 import com.yahoo.config.application.api.FileRegistry;
 
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
 
@@ -20,7 +20,7 @@ public class OnnxModels {
     /** The schema this belongs to, or empty if it is global */
     private final Optional<Schema> owner;
 
-    private final Map<String, OnnxModel> models = new LinkedHashMap<>();
+    private final Map<String, OnnxModel> models = new HashMap<>();
 
     public OnnxModels(FileRegistry fileRegistry, Optional<Schema> owner) {
         this.fileRegistry = fileRegistry;
@@ -59,7 +59,7 @@ public class OnnxModels {
         if (owner.isEmpty() || owner.get().inherited().isEmpty()) return Collections.unmodifiableMap(models);
         if (models.isEmpty()) return owner.get().inherited().get().onnxModels().asMap();
 
-        var allModels = new LinkedHashMap<>(owner.get().inherited().get().onnxModels().asMap());
+        var allModels = new HashMap<>(owner.get().inherited().get().onnxModels().asMap());
         allModels.putAll(models);
         return Collections.unmodifiableMap(allModels);
     }
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/RankProfile.java b/config-model/src/main/java/com/yahoo/searchdefinition/RankProfile.java
index 495f5473442..5b842b002bd 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/RankProfile.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/RankProfile.java
@@ -32,7 +32,7 @@ import java.io.Serializable;
 import java.io.StringReader;
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
@@ -121,7 +121,7 @@ public class RankProfile implements Cloneable {
     private final RankProfileRegistry rankProfileRegistry;
 
     /** Constants in ranking expressions */
-    private Map<String, Value> constants = new LinkedHashMap<>();
+    private Map<String, Value> constants = new HashMap<>();
 
     private final TypeSettings attributeTypes = new TypeSettings();
 
@@ -396,9 +396,9 @@ public class RankProfile implements Cloneable {
 
     /** Returns an unmodifiable view of the constants available in this */
     public Map<String, Value> getConstants() {
-        if (inherited().isEmpty()) return new LinkedHashMap<>(constants);
+        if (inherited().isEmpty()) return new HashMap<>(constants);
 
-        Map<String, Value> allConstants = new LinkedHashMap<>();
+        Map<String, Value> allConstants = new HashMap<>();
         for (var inheritedProfile : inherited()) {
             for (var constant : inheritedProfile.getConstants().entrySet()) {
                 if (allConstants.containsKey(constant.getKey()))
@@ -873,7 +873,7 @@ public class RankProfile implements Cloneable {
             clone.functions = new LinkedHashMap<>(this.functions);
             clone.allFunctionsCached = null;
             clone.filterFields = new HashSet<>(this.filterFields);
-            clone.constants = new LinkedHashMap<>(this.constants);
+            clone.constants = new HashMap<>(this.constants);
             return clone;
         }
         catch (CloneNotSupportedException e) {
@@ -989,7 +989,7 @@ public class RankProfile implements Cloneable {
     public MapEvaluationTypeContext typeContext() { return typeContext(new QueryProfileRegistry()); }
 
     private Map<Reference, TensorType> collectFeatureTypes() {
-        Map<Reference, TensorType> featureTypes = new LinkedHashMap<>();
+        Map<Reference, TensorType> featureTypes = new HashMap<>();
         // Add input features
         inputFeatures.forEach((k, v) -> featureTypes.put(k, v));
         // Add attributes
@@ -1042,7 +1042,7 @@ public class RankProfile implements Cloneable {
     }
 
     private Map<String, TensorType> resolveOnnxInputTypes(OnnxModel model, MapEvaluationTypeContext context) {
-        Map<String, TensorType> inputTypes = new LinkedHashMap<>();
+        Map<String, TensorType> inputTypes = new HashMap<>();
         for (String onnxInputName : model.getInputMap().keySet()) {
             resolveOnnxInputType(onnxInputName, model, context).ifPresent(type -> inputTypes.put(onnxInputName, type));
         }
@@ -1320,7 +1320,7 @@ public class RankProfile implements Cloneable {
 
     public static class TypeSettings {
 
-        private final Map<String, String> types = new LinkedHashMap<>();
+        private final Map<String, String> types = new HashMap<>();
 
         void addType(String name, String type) {
             types.put(name, type);
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/RankingConstants.java b/config-model/src/main/java/com/yahoo/searchdefinition/RankingConstants.java
index 277b1d16207..5020e9a061c 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/RankingConstants.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/RankingConstants.java
@@ -4,7 +4,7 @@ package com.yahoo.searchdefinition;
 import com.yahoo.config.application.api.FileRegistry;
 
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
 import java.util.concurrent.ConcurrentHashMap;
@@ -70,7 +70,7 @@ public class RankingConstants {
         if (owner.isEmpty() || owner.get().inherited().isEmpty()) return Collections.unmodifiableMap(constants);
         if (constants.isEmpty()) return owner.get().inherited().get().rankingConstants().asMap();
 
-        var allConstants = new LinkedHashMap<>(owner.get().inherited().get().rankingConstants().asMap());
+        var allConstants = new HashMap<>(owner.get().inherited().get().rankingConstants().asMap());
         allConstants.putAll(constants);
         return Collections.unmodifiableMap(allConstants);
     }
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/derived/SearchOrderer.java b/config-model/src/main/java/com/yahoo/searchdefinition/derived/SearchOrderer.java
index 15a6db8304b..8703eb11433 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/derived/SearchOrderer.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/derived/SearchOrderer.java
@@ -23,7 +23,7 @@ import java.util.*;
 public class SearchOrderer {
 
     /** A map from DataTypeName to the Search defining them */
-    private final Map<DataTypeName, Schema> documentNameToSearch = new LinkedHashMap<>();
+    private final Map<DataTypeName, Schema> documentNameToSearch = new HashMap<>();
 
     /**
      * Reorders the given list of search definitions such that any supertype
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/document/SDDocumentType.java b/config-model/src/main/java/com/yahoo/searchdefinition/document/SDDocumentType.java
index d0029f72064..e627f06ad42 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/document/SDDocumentType.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/document/SDDocumentType.java
@@ -18,7 +18,7 @@ import com.yahoo.searchdefinition.Schema;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
@@ -37,8 +37,8 @@ import java.util.Set;
 public class SDDocumentType implements Cloneable, Serializable {
 
     public static final SDDocumentType VESPA_DOCUMENT;
-    private final Map<DataTypeName, SDDocumentType> inheritedTypes = new LinkedHashMap<>();
-    private final Map<NewDocumentType.Name, SDDocumentType> ownedTypes = new LinkedHashMap<>();
+    private final Map<DataTypeName, SDDocumentType> inheritedTypes = new HashMap<>();
+    private final Map<NewDocumentType.Name, SDDocumentType> ownedTypes = new HashMap<>();
     private final AnnotationTypeRegistry annotationTypes = new AnnotationTypeRegistry();
     private DocumentType docType;    
     private DataType structType;
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/document/SDField.java b/config-model/src/main/java/com/yahoo/searchdefinition/document/SDField.java
index e1f5fd470b4..edb317f4a99 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/document/SDField.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/document/SDField.java
@@ -31,7 +31,7 @@ import com.yahoo.vespa.indexinglanguage.parser.ParseException;
 
 import java.util.Collection;
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.ListIterator;
@@ -113,7 +113,7 @@ public class SDField extends Field implements TypedKey, FieldOperationContainer,
     private SDDocumentType ownerDocType = null;
 
     /** The aliases declared for this field. May pertain to indexes or attributes */
-    private final Map<String, String> aliasToName = new LinkedHashMap<>();
+    private final Map<String, String> aliasToName = new HashMap<>();
 
     /** Pending operations that must be applied after parsing, due to use of not-yet-defined structs. */
     private final List<FieldOperation> pendingOperations = new LinkedList<>();
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/document/TemporaryImportedFields.java b/config-model/src/main/java/com/yahoo/searchdefinition/document/TemporaryImportedFields.java
index 8b73560ae77..b4d76445507 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/document/TemporaryImportedFields.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/document/TemporaryImportedFields.java
@@ -4,7 +4,7 @@ package com.yahoo.searchdefinition.document;
 import com.yahoo.searchdefinition.Schema;
 
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.Map;
 
@@ -36,7 +36,7 @@ public class TemporaryImportedFields {
         if (owner.inherited().isEmpty()) return Collections.unmodifiableMap(fields);
         if (owner.inherited().get().temporaryImportedFields().isEmpty()) return Collections.unmodifiableMap(fields);
 
-        var allFields = new LinkedHashMap<>(owner.inherited().get().temporaryImportedFields().get().fields());
+        var allFields = new HashMap<>(owner.inherited().get().temporaryImportedFields().get().fields());
         allFields.putAll(fields);
         return allFields;
     }
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/LightGBMFeatureConverter.java b/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/LightGBMFeatureConverter.java
index f6b9c56d869..1bccac237d5 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/LightGBMFeatureConverter.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/LightGBMFeatureConverter.java
@@ -11,7 +11,7 @@ import com.yahoo.vespa.model.ml.ConvertedModel;
 import com.yahoo.vespa.model.ml.FeatureArguments;
 
 import java.io.UncheckedIOException;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -23,7 +23,7 @@ import java.util.Map;
 public class LightGBMFeatureConverter extends ExpressionTransformer<RankProfileTransformContext> {
 
     /** A cache of imported models indexed by model path. This avoids importing the same model multiple times. */
-    private final Map<Path, ConvertedModel> convertedLightGBMModels = new LinkedHashMap<>();
+    private final Map<Path, ConvertedModel> convertedLightGBMModels = new HashMap<>();
 
     @Override
     public ExpressionNode transform(ExpressionNode node, RankProfileTransformContext context) {
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/OnnxFeatureConverter.java b/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/OnnxFeatureConverter.java
index 3d9989cf4d4..6944a1f9dd1 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/OnnxFeatureConverter.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/OnnxFeatureConverter.java
@@ -11,7 +11,7 @@ import com.yahoo.vespa.model.ml.ConvertedModel;
 import com.yahoo.vespa.model.ml.FeatureArguments;
 
 import java.io.UncheckedIOException;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -25,7 +25,7 @@ import java.util.Map;
 public class OnnxFeatureConverter extends ExpressionTransformer<RankProfileTransformContext> {
 
     /** A cache of imported models indexed by model path. This avoids importing the same model multiple times. */
-    private final Map<Path, ConvertedModel> convertedOnnxModels = new LinkedHashMap<>();
+    private final Map<Path, ConvertedModel> convertedOnnxModels = new HashMap<>();
 
     @Override
     public ExpressionNode transform(ExpressionNode node, RankProfileTransformContext context) {
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/RankProfileTransformContext.java b/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/RankProfileTransformContext.java
index a4c16d809ef..be35c2c752e 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/RankProfileTransformContext.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/RankProfileTransformContext.java
@@ -9,7 +9,7 @@ import com.yahoo.searchlib.rankingexpression.evaluation.Value;
 import com.yahoo.searchlib.rankingexpression.transform.TransformContext;
 import com.yahoo.tensor.TensorType;
 
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -23,7 +23,7 @@ public class RankProfileTransformContext extends TransformContext {
     private final QueryProfileRegistry queryProfiles;
     private final ImportedMlModels importedModels;
     private final Map<String, RankProfile.RankingExpressionFunction> inlineFunctions;
-    private final Map<String, String> rankProperties = new LinkedHashMap<>();
+    private final Map<String, String> rankProperties = new HashMap<>();
 
     public RankProfileTransformContext(RankProfile rankProfile,
                                        QueryProfileRegistry queryProfiles,
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/TensorFlowFeatureConverter.java b/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/TensorFlowFeatureConverter.java
index 982a590940a..7b165d94cae 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/TensorFlowFeatureConverter.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/TensorFlowFeatureConverter.java
@@ -11,7 +11,7 @@ import com.yahoo.vespa.model.ml.ConvertedModel;
 import com.yahoo.vespa.model.ml.FeatureArguments;
 
 import java.io.UncheckedIOException;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -24,7 +24,7 @@ import java.util.Map;
 public class TensorFlowFeatureConverter extends ExpressionTransformer<RankProfileTransformContext>  {
 
     /** A cache of imported models indexed by model path. This avoids importing the same model multiple times. */
-    private final Map<Path, ConvertedModel> convertedTensorFlowModels = new LinkedHashMap<>();
+    private final Map<Path, ConvertedModel> convertedTensorFlowModels = new HashMap<>();
 
     public TensorFlowFeatureConverter() {}
 
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/XgboostFeatureConverter.java b/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/XgboostFeatureConverter.java
index bf44cc27e72..296ffd5f7fe 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/XgboostFeatureConverter.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/expressiontransforms/XgboostFeatureConverter.java
@@ -11,7 +11,7 @@ import com.yahoo.vespa.model.ml.ConvertedModel;
 import com.yahoo.vespa.model.ml.FeatureArguments;
 
 import java.io.UncheckedIOException;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -25,7 +25,7 @@ import java.util.Map;
 public class XgboostFeatureConverter extends ExpressionTransformer<RankProfileTransformContext> {
 
     /** A cache of imported models indexed by model path. This avoids importing the same model multiple times. */
-    private final Map<Path, ConvertedModel> convertedXGBoostModels = new LinkedHashMap<>();
+    private final Map<Path, ConvertedModel> convertedXGBoostModels = new HashMap<>();
 
     @Override
     public ExpressionNode transform(ExpressionNode node, RankProfileTransformContext context) {
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/processing/MatchConsistency.java b/config-model/src/main/java/com/yahoo/searchdefinition/processing/MatchConsistency.java
index 928afdaba13..c302ef63cfd 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/processing/MatchConsistency.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/processing/MatchConsistency.java
@@ -12,7 +12,7 @@ import com.yahoo.vespa.indexinglanguage.expressions.Expression;
 import com.yahoo.vespa.indexinglanguage.expressions.IndexExpression;
 import com.yahoo.vespa.model.container.search.QueryProfiles;
 
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -33,7 +33,7 @@ public class MatchConsistency extends Processor {
     public void process(boolean validate, boolean documentsOnly) {
         if ( ! validate) return;
 
-        Map<String, Matching.Type> types = new LinkedHashMap<>();
+        Map<String, Matching.Type> types = new HashMap<>();
         for (SDField field : schema.allConcreteFields()) {
             new MyVisitor(schema, field, types).visit(field.getIndexingScript());
         }
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/processing/SummaryNamesFieldCollisions.java b/config-model/src/main/java/com/yahoo/searchdefinition/processing/SummaryNamesFieldCollisions.java
index 5d98439f0cd..2d0afe88281 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/processing/SummaryNamesFieldCollisions.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/processing/SummaryNamesFieldCollisions.java
@@ -1,7 +1,7 @@
 // Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.searchdefinition.processing;
 
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 import com.yahoo.collections.Pair;
@@ -29,7 +29,7 @@ public class SummaryNamesFieldCollisions extends Processor {
     public void process(boolean validate, boolean documentsOnly) {
         if ( ! validate) return;
 
-        Map<String, Pair<String, String>> fieldToClassAndSource = new LinkedHashMap<>();
+        Map<String, Pair<String, String>> fieldToClassAndSource = new HashMap<>();
         for (DocumentSummary summary : schema.getSummaries().values()) {
             if ("default".equals(summary.getName())) continue;
             for (SummaryField summaryField : summary.getSummaryFields().values()) {
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateFieldTypes.java b/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateFieldTypes.java
index fdb8da0715a..68bf2511a4b 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateFieldTypes.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateFieldTypes.java
@@ -11,7 +11,7 @@ import com.yahoo.vespa.documentmodel.DocumentSummary;
 import com.yahoo.vespa.documentmodel.SummaryField;
 import com.yahoo.vespa.model.container.search.QueryProfiles;
 
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -32,7 +32,7 @@ public class ValidateFieldTypes extends Processor {
         if (!validate) return;
 
         String searchName = schema.getName();
-        Map<String, DataType> seenFields = new LinkedHashMap<>();
+        Map<String, DataType> seenFields = new HashMap<>();
         verifySearchAndDocFields(searchName, seenFields);
         verifySummaryFields(searchName, seenFields);
     }
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateFieldTypesDocumentsOnly.java b/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateFieldTypesDocumentsOnly.java
index 6fcfadca5b6..e8b218a80ad 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateFieldTypesDocumentsOnly.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateFieldTypesDocumentsOnly.java
@@ -7,7 +7,7 @@ import com.yahoo.searchdefinition.RankProfileRegistry;
 import com.yahoo.searchdefinition.Schema;
 import com.yahoo.vespa.model.container.search.QueryProfiles;
 
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 public class ValidateFieldTypesDocumentsOnly extends ValidateFieldTypes {
@@ -20,7 +20,7 @@ public class ValidateFieldTypesDocumentsOnly extends ValidateFieldTypes {
         if ( ! validate) return;
 
         String searchName = schema.getName();
-        Map<String, DataType> seenFields = new LinkedHashMap<>();
+        Map<String, DataType> seenFields = new HashMap<>();
         verifySearchAndDocFields(searchName, seenFields);
     }
 }
diff --git a/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateStructTypeInheritance.java b/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateStructTypeInheritance.java
index a8322f83715..d99832e3df6 100644
--- a/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateStructTypeInheritance.java
+++ b/config-model/src/main/java/com/yahoo/searchdefinition/processing/ValidateStructTypeInheritance.java
@@ -12,7 +12,7 @@ import com.yahoo.document.StructDataType;
 import com.yahoo.searchdefinition.document.SDDocumentType;
 
 import java.util.ArrayList;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.HashSet;
 import java.util.Set;
diff --git a/config-model/src/main/java/com/yahoo/vespa/configmodel/producers/DocumentManager.java b/config-model/src/main/java/com/yahoo/vespa/configmodel/producers/DocumentManager.java
index e77ea7f9867..9b4b3eba3a7 100644
--- a/config-model/src/main/java/com/yahoo/vespa/configmodel/producers/DocumentManager.java
+++ b/config-model/src/main/java/com/yahoo/vespa/configmodel/producers/DocumentManager.java
@@ -14,7 +14,7 @@ import com.yahoo.vespa.documentmodel.DocumentModel;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.IdentityHashMap;
 import java.util.List;
@@ -201,7 +201,7 @@ public class DocumentManager {
 
     public DocumentmanagerConfig.Builder produceDocTypes(DocumentModel model, DocumentmanagerConfig.Builder builder) {
         builder.usev8geopositions(this.useV8GeoPositions);
-        Map<NewDocumentType.Name, NewDocumentType> produced = new LinkedHashMap<>();
+        Map<NewDocumentType.Name, NewDocumentType> produced = new HashMap<>();
         var indexMap = new IdxMap();
         for (NewDocumentType documentType : model.getDocumentManager().getTypes()) {
             docTypeInheritOrder(documentType, builder, produced, indexMap);
@@ -225,7 +225,7 @@ public class DocumentManager {
     }
 
     static private class IdxMap {
-        private Map<Integer, Boolean> doneMap = new LinkedHashMap<>();
+        private Map<Integer, Boolean> doneMap = new HashMap<>();
         private Map<Object, Integer> map = new IdentityHashMap<>();
         void add(Object someType) {
             assert(someType != null);
diff --git a/config-model/src/main/java/com/yahoo/vespa/configmodel/producers/DocumentTypes.java b/config-model/src/main/java/com/yahoo/vespa/configmodel/producers/DocumentTypes.java
index 930a48570c2..ac1b92e287f 100644
--- a/config-model/src/main/java/com/yahoo/vespa/configmodel/producers/DocumentTypes.java
+++ b/config-model/src/main/java/com/yahoo/vespa/configmodel/producers/DocumentTypes.java
@@ -25,7 +25,7 @@ public class DocumentTypes {
 
     public DocumenttypesConfig.Builder produce(DocumentModel model, DocumenttypesConfig.Builder builder) {
         builder.usev8geopositions(this.useV8GeoPositions);
-        Map<NewDocumentType.Name, NewDocumentType> produced = new LinkedHashMap<>();
+        Map<NewDocumentType.Name, NewDocumentType> produced = new HashMap<>();
         for (NewDocumentType documentType : model.getDocumentManager().getTypes()) {
             produceInheritOrder(documentType, builder, produced);
         }
diff --git a/config-model/src/main/java/com/yahoo/vespa/documentmodel/DocumentSummary.java b/config-model/src/main/java/com/yahoo/vespa/documentmodel/DocumentSummary.java
index 4c76de1ab81..59b4e1a2f9b 100644
--- a/config-model/src/main/java/com/yahoo/vespa/documentmodel/DocumentSummary.java
+++ b/config-model/src/main/java/com/yahoo/vespa/documentmodel/DocumentSummary.java
@@ -6,7 +6,7 @@ import com.yahoo.searchdefinition.Schema;
 
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
diff --git a/config-model/src/main/java/com/yahoo/vespa/documentmodel/SearchDef.java b/config-model/src/main/java/com/yahoo/vespa/documentmodel/SearchDef.java
index 193313a44dc..cd146c45065 100644
--- a/config-model/src/main/java/com/yahoo/vespa/documentmodel/SearchDef.java
+++ b/config-model/src/main/java/com/yahoo/vespa/documentmodel/SearchDef.java
@@ -4,7 +4,7 @@ package com.yahoo.vespa.documentmodel;
 import com.yahoo.document.DataType;
 import com.yahoo.document.DocumentTypeManager;
 
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.logging.Logger;
 
@@ -19,11 +19,11 @@ public class SearchDef {
     /// These are the real backing documenttypes
     private DocumentTypeManager sources = new DocumentTypeManager();
     /// Map of all search fields
-    private Map<String, SearchField> fields = new LinkedHashMap<>();
+    private Map<String, SearchField> fields = new HashMap<>();
     /// Map of all views that can be searched.
-    private Map<String, FieldView> views = new LinkedHashMap<>();
+    private Map<String, FieldView> views = new HashMap<>();
     /// Map of all aliases <alias, realname>
-    private Map<String, String> aliases = new LinkedHashMap<>();
+    private Map<String, String> aliases = new HashMap<>();
 
     /**
      * Will create a SearchDef with the given name
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/AbstractService.java b/config-model/src/main/java/com/yahoo/vespa/model/AbstractService.java
index 5cbb8fc0f41..78cbb722bc7 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/AbstractService.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/AbstractService.java
@@ -12,6 +12,7 @@ import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
 import java.util.Set;
@@ -121,7 +122,7 @@ public abstract class AbstractService extends AbstractConfigProducer<AbstractCon
      * @param services A {@link Collection} of services of the same type, not necessarily on the same host.
      */
     public static <SERVICE extends AbstractService> void distributeCpuSocketAffinity(Collection<SERVICE> services) {
-        Map<HostResource, List<SERVICE>> affinityMap = new LinkedHashMap<>();
+        Map<HostResource, List<SERVICE>> affinityMap = new HashMap<>();
         for (SERVICE service : services) {
             if (!affinityMap.containsKey(service.getHostResource())) {
                 affinityMap.put(service.getHostResource(), new ArrayList<>());
@@ -459,7 +460,7 @@ public abstract class AbstractService extends AbstractConfigProducer<AbstractCon
      *
      * @return the default dimensions for this service
      */
-    public Map<String, String> getDefaultMetricDimensions(){ return new LinkedHashMap<>(); }
+    public HashMap<String, String> getDefaultMetricDimensions(){ return new LinkedHashMap<>(); }
 
     // For testing
     public int getNumPortsAllocated() {
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/PortFinder.java b/config-model/src/main/java/com/yahoo/vespa/model/PortFinder.java
index 16a1117e733..47a473eeb0f 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/PortFinder.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/PortFinder.java
@@ -5,7 +5,7 @@ package com.yahoo.vespa.model;
 import static com.yahoo.config.provision.NetworkPorts.Allocation;
 
 import java.util.Collection;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.TreeMap;
 
@@ -16,7 +16,7 @@ public class PortFinder {
 
     private static final Logger log = Logger.getLogger(PortFinder.class.getName());
 
-    private final Map<String, Allocation> byKeys = new LinkedHashMap<>();
+    private final Map<String, Allocation> byKeys = new HashMap<>();
     private final Map<Integer, Allocation> byPorts = new TreeMap<>();
 
     /** force add the given allocation, removing any conflicting ones */
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/Service.java b/config-model/src/main/java/com/yahoo/vespa/model/Service.java
index fbcd702ce43..3849a57db6f 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/Service.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/Service.java
@@ -3,7 +3,7 @@ package com.yahoo.vespa.model;
 
 import com.yahoo.config.model.api.ServiceInfo;
 
-import java.util.Map;
+import java.util.HashMap;
 import java.util.Optional;
 
 /**
@@ -68,8 +68,8 @@ public interface Service extends ConfigProducer, NetworkPortRequestor {
 
     int getHealthPort();
 
-    /** Returns a Map of default dimensions for metrics. */
-    Map<String,String> getDefaultMetricDimensions();
+    /** Returns a HashMap of default dimensions for metrics. */
+    HashMap<String,String> getDefaultMetricDimensions();
 
     /** Returns the Affinity of this service if it has. */
     Optional<Affinity> getAffinity();
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/admin/clustercontroller/ReindexingContext.java b/config-model/src/main/java/com/yahoo/vespa/model/admin/clustercontroller/ReindexingContext.java
index 621b23ef942..899751f39ee 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/admin/clustercontroller/ReindexingContext.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/admin/clustercontroller/ReindexingContext.java
@@ -5,7 +5,7 @@ import com.yahoo.config.model.api.Reindexing;
 import com.yahoo.documentmodel.NewDocumentType;
 
 import java.util.Collection;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Objects;
@@ -19,7 +19,7 @@ import java.util.Set;
 public class ReindexingContext {
 
     private final Object monitor = new Object();
-    private final Map<String, Set<NewDocumentType>> documentTypesPerCluster = new LinkedHashMap<>();
+    private final Map<String, Set<NewDocumentType>> documentTypesPerCluster = new HashMap<>();
     private final Reindexing reindexing;
 
     public ReindexingContext(Reindexing reindexing) {
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/admin/monitoring/Metric.java b/config-model/src/main/java/com/yahoo/vespa/model/admin/monitoring/Metric.java
index e095fea2d54..c2b0a358a54 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/admin/monitoring/Metric.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/admin/monitoring/Metric.java
@@ -3,7 +3,7 @@ package com.yahoo.vespa.model.admin.monitoring;
 
 import javax.annotation.concurrent.Immutable;
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.Map;
 
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/application/validation/BundleValidator.java b/config-model/src/main/java/com/yahoo/vespa/model/application/validation/BundleValidator.java
index 37701df73ef..a1024425124 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/application/validation/BundleValidator.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/application/validation/BundleValidator.java
@@ -8,7 +8,7 @@ import org.w3c.dom.Document;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
@@ -62,7 +62,7 @@ public class BundleValidator extends AbstractBundleValidator {
     @Override protected void validatePomXml(DeployState state, JarFile jar, Document pom) {}
 
     private void validateImportedPackages(DeployState state, JarFile jar, Manifest manifest) {
-        Map<DeprecatedProvidedBundle, List<String>> deprecatedPackagesInUse = new LinkedHashMap<>();
+        Map<DeprecatedProvidedBundle, List<String>> deprecatedPackagesInUse = new HashMap<>();
         forEachImportPackage(manifest, (packageName, versionRange) -> {
             for (DeprecatedProvidedBundle deprecatedBundle : DeprecatedProvidedBundle.values()) {
                 for (Predicate<String> matcher : deprecatedBundle.javaPackageMatchers) {
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/builder/xml/dom/chains/docproc/DocumentProcessorModelBuilder.java b/config-model/src/main/java/com/yahoo/vespa/model/builder/xml/dom/chains/docproc/DocumentProcessorModelBuilder.java
index 390a366392d..a8a7c4d33d2 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/builder/xml/dom/chains/docproc/DocumentProcessorModelBuilder.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/builder/xml/dom/chains/docproc/DocumentProcessorModelBuilder.java
@@ -7,7 +7,7 @@ import com.yahoo.vespa.model.builder.xml.dom.chains.ChainedComponentModelBuilder
 import com.yahoo.vespa.model.container.docproc.model.DocumentProcessorModel;
 import org.w3c.dom.Element;
 
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -15,7 +15,7 @@ import java.util.Map;
  */
 public class DocumentProcessorModelBuilder extends ChainedComponentModelBuilder {
 
-    private Map<Pair<String, String>, String> fieldNameSchemaMap = new LinkedHashMap<>();
+    private Map<Pair<String, String>, String> fieldNameSchemaMap = new HashMap<>();
 
     public DocumentProcessorModelBuilder(Element spec) {
         super(spec);
@@ -38,7 +38,7 @@ public class DocumentProcessorModelBuilder extends ChainedComponentModelBuilder
      * @return doctype, in-document → in-processor
      */
     public static Map<Pair<String,String>, String> parseFieldNameSchemaMap(Element e) {
-        Map<Pair<String, String>, String> ret = new LinkedHashMap<>();
+        Map<Pair<String, String>, String> ret = new HashMap<>();
         for (Element sm : XML.getChildren(e, "map")) {
             for (Element fm : XML.getChildren(sm, "field")) {
                 String from = fm.getAttribute("in-document");
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/container/Container.java b/config-model/src/main/java/com/yahoo/vespa/model/container/Container.java
index 54795405a7a..2e5126dcc44 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/container/Container.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/container/Container.java
@@ -32,8 +32,7 @@ import com.yahoo.vespa.model.filedistribution.FileDistributionConfigProducer;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
-import java.util.LinkedHashMap;
-import java.util.Map;
+import java.util.HashMap;
 import java.util.Objects;
 import java.util.Optional;
 
@@ -386,8 +385,8 @@ public abstract class Container extends AbstractService implements
     }
 
     @Override
-    public Map<String,String> getDefaultMetricDimensions(){
-        Map<String, String> dimensions = new LinkedHashMap<>();
+    public HashMap<String,String> getDefaultMetricDimensions(){
+        HashMap<String, String> dimensions = new HashMap<>();
         if (clusterName != null)
             dimensions.put("clustername", clusterName);
         return dimensions;
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/container/docproc/ContainerDocproc.java b/config-model/src/main/java/com/yahoo/vespa/model/container/docproc/ContainerDocproc.java
index ff29e458b26..8be02f77ab3 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/container/docproc/ContainerDocproc.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/container/docproc/ContainerDocproc.java
@@ -11,7 +11,7 @@ import com.yahoo.vespa.model.container.ContainerCluster;
 import com.yahoo.vespa.model.container.component.ContainerSubsystem;
 import com.yahoo.vespa.model.container.component.SystemBindingPattern;
 
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -32,7 +32,7 @@ public class ContainerDocproc extends ContainerSubsystem<DocprocChains>
     // The number of nodes to use per client.
     private int numNodesPerClient = 0;
 
-    private Map<Pair<String, String>, String> fieldNameSchemaMap = new LinkedHashMap<>();
+    private Map<Pair<String, String>, String> fieldNameSchemaMap = new HashMap<>();
 
     public ContainerDocproc(ContainerCluster cluster, DocprocChains chains) {
         this(cluster, chains, new Options(false, null, null, null, null, null, null));
@@ -106,7 +106,7 @@ public class ContainerDocproc extends ContainerSubsystem<DocprocChains>
     
     @Override
     public void getConfig(SchemamappingConfig.Builder builder) {
-        Map<Pair<String, String>, String> allMappings = new LinkedHashMap<>();
+        Map<Pair<String, String>, String> allMappings = new HashMap<>();
         for (DocprocChain chain : getChains().allChains().allComponents()) {
             for (DocumentProcessor processor : chain.getInnerComponents()) {
                 allMappings.putAll(fieldNameSchemaMap());
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/container/docproc/model/DocumentProcessorModel.java b/config-model/src/main/java/com/yahoo/vespa/model/container/docproc/model/DocumentProcessorModel.java
index 64131717f50..669be44d0f6 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/container/docproc/model/DocumentProcessorModel.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/container/docproc/model/DocumentProcessorModel.java
@@ -7,7 +7,7 @@ import com.yahoo.component.chain.dependencies.Dependencies;
 import com.yahoo.component.chain.model.ChainedComponentModel;
 import net.jcip.annotations.Immutable;
 
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -16,7 +16,7 @@ import java.util.Map;
 @Immutable
 public class DocumentProcessorModel extends ChainedComponentModel {
 
-    private final Map<Pair<String, String>, String> fieldNameSchemaMap = new LinkedHashMap<>();
+    private final Map<Pair<String, String>, String> fieldNameSchemaMap = new HashMap<>();
 
     public DocumentProcessorModel(BundleInstantiationSpecification bundleInstantiationSpec, Dependencies dependencies, Map<Pair<String, String>, String> fieldNameSchemaMap) {
         super(bundleInstantiationSpec, dependencies);
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/container/http/FilterConfigProvider.java b/config-model/src/main/java/com/yahoo/vespa/model/container/http/FilterConfigProvider.java
index 804ba5a7f9a..458edac4379 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/container/http/FilterConfigProvider.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/container/http/FilterConfigProvider.java
@@ -9,6 +9,7 @@ import com.yahoo.container.core.http.HttpFilterConfig;
 import com.yahoo.osgi.provider.model.ComponentModel;
 import com.yahoo.vespa.model.container.component.SimpleComponent;
 
+import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.Map;
 
@@ -16,6 +17,7 @@ import static com.yahoo.container.core.http.HttpFilterConfig.Param;
 
 /**
  * @author gjoranv
+ * @since 5.1.23
  */
 public class FilterConfigProvider extends SimpleComponent implements HttpFilterConfig.Producer {
 
@@ -23,7 +25,7 @@ public class FilterConfigProvider extends SimpleComponent implements HttpFilterC
             ComponentSpecification.fromString(com.yahoo.container.FilterConfigProvider.class.getName());
 
     private final ChainedComponentModel filterModel;
-    private final Map<String, String> configMap = new LinkedHashMap<>();
+    private HashMap<String, String> configMap = new LinkedHashMap<>();
 
     public FilterConfigProvider(ChainedComponentModel filterModel) {
         super(new ComponentModel(
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/container/ml/ModelsEvaluatorTester.java b/config-model/src/main/java/com/yahoo/vespa/model/container/ml/ModelsEvaluatorTester.java
index 219bcaa95c2..6532fed9abf 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/container/ml/ModelsEvaluatorTester.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/container/ml/ModelsEvaluatorTester.java
@@ -33,7 +33,7 @@ import java.io.IOException;
 import java.nio.ByteBuffer;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 
 /**
@@ -139,7 +139,7 @@ public class ModelsEvaluatorTester {
     }
 
     private static FileAcquirer createFileAcquirer(MockFileRegistry fileRegistry, File appDir) {
-        Map<String, File> fileMap = new LinkedHashMap<>();
+        Map<String, File> fileMap = new HashMap<>();
         for (FileRegistry.Entry entry : fileRegistry.export()) {
             fileMap.put(entry.reference.value(), relativePath(appDir, entry.reference.value()));
         }
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/container/search/DeclaredQueryProfileVariants.java b/config-model/src/main/java/com/yahoo/vespa/model/container/search/DeclaredQueryProfileVariants.java
index 3dc02b1ef9c..85aefdb42af 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/container/search/DeclaredQueryProfileVariants.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/container/search/DeclaredQueryProfileVariants.java
@@ -120,7 +120,7 @@ public class DeclaredQueryProfileVariants {
 
         private final Map<String, Object> values = new LinkedHashMap<>();
 
-        private final Map<String, Boolean> overridable = new LinkedHashMap<>();
+        private final Map<String, Boolean> overridable = new HashMap<>();
 
         private final List<QueryProfile> inherited = new ArrayList<>();
 
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/ml/ConvertedModel.java b/config-model/src/main/java/com/yahoo/vespa/model/ml/ConvertedModel.java
index 6be19757ee6..38b1d42862e 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/ml/ConvertedModel.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/ml/ConvertedModel.java
@@ -36,7 +36,7 @@ import java.io.StringReader;
 import java.io.UncheckedIOException;
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -211,7 +211,7 @@ public class ConvertedModel {
         addGeneratedFunctions(model, profile);
 
         // Add expressions
-        Map<String, ExpressionFunction> expressions = new LinkedHashMap<>();
+        Map<String, ExpressionFunction> expressions = new HashMap<>();
         for (ImportedMlFunction outputFunction : model.outputExpressions()) {
             ExpressionFunction expression = asExpressionFunction(outputFunction);
             for (Map.Entry<String, TensorType> input : expression.argumentTypes().entrySet()) {
@@ -232,7 +232,7 @@ public class ConvertedModel {
 
     private static ExpressionFunction asExpressionFunction(ImportedMlFunction function) {
         try {
-            Map<String, TensorType> argumentTypes = new LinkedHashMap<>();
+            Map<String, TensorType> argumentTypes = new HashMap<>();
             for (Map.Entry<String, String> entry : function.argumentTypes().entrySet())
                 argumentTypes.put(entry.getKey(), TensorType.fromSpec(entry.getValue()));
 
@@ -278,7 +278,7 @@ public class ConvertedModel {
             addGeneratedFunctionToProfile(profile, function.getFirst(), function.getSecond());
         }
 
-        Map<String, ExpressionFunction> expressions = new LinkedHashMap<>();
+        Map<String, ExpressionFunction> expressions = new HashMap<>();
         for (Pair<String, ExpressionFunction> output : store.readExpressions()) {
             String name = output.getFirst();
             ExpressionFunction expression = output.getSecond();
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/ml/OnnxModelInfo.java b/config-model/src/main/java/com/yahoo/vespa/model/ml/OnnxModelInfo.java
index c108168c0d0..88139de7888 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/ml/OnnxModelInfo.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/ml/OnnxModelInfo.java
@@ -18,7 +18,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
@@ -40,7 +40,7 @@ public class OnnxModelInfo {
     private final String defaultOutput;
     private final Map<String, OnnxTypeInfo> inputs;
     private final Map<String, OnnxTypeInfo> outputs;
-    private final Map<String, TensorType> vespaTypes = new LinkedHashMap<>();
+    private final Map<String, TensorType> vespaTypes = new HashMap<>();
 
     private OnnxModelInfo(String path, Map<String, OnnxTypeInfo> inputs, Map<String, OnnxTypeInfo> outputs, String defaultOutput) {
         this.modelPath = path;
@@ -77,7 +77,7 @@ public class OnnxModelInfo {
         }
         if (onnxTypeInfo.containsUnknownDimensionSizes()) {
             Set<Long> unboundSizes = new HashSet<>();
-            Map<String, Long> symbolicSizes = new LinkedHashMap<>();
+            Map<String, Long> symbolicSizes = new HashMap<>();
             resolveUnknownDimensionSizes(inputTypes, symbolicSizes, unboundSizes);
             return onnxTypeInfo.toVespaTensorType(symbolicSizes, unboundSizes);
         }
@@ -205,8 +205,8 @@ public class OnnxModelInfo {
     static public OnnxModelInfo jsonToModelInfo(String json) throws IOException {
         ObjectMapper m = new ObjectMapper();
         JsonNode root = m.readTree(json);
-        Map<String, OnnxTypeInfo> inputs = new LinkedHashMap<>();
-        Map<String, OnnxTypeInfo> outputs = new LinkedHashMap<>();
+        Map<String, OnnxTypeInfo> inputs = new HashMap<>();
+        Map<String, OnnxTypeInfo> outputs = new HashMap<>();
         String defaultOutput = "";
 
         String path = null;
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/search/IndexingDocprocChain.java b/config-model/src/main/java/com/yahoo/vespa/model/search/IndexingDocprocChain.java
index e20767bf864..0446a6c5dce 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/search/IndexingDocprocChain.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/search/IndexingDocprocChain.java
@@ -8,7 +8,7 @@ import com.yahoo.vespa.configdefinition.SpecialtokensConfig;
 import com.yahoo.vespa.model.container.docproc.DocprocChain;
 
 import java.util.ArrayList;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Set;
 
@@ -30,7 +30,7 @@ public class IndexingDocprocChain extends DocprocChain implements SpecialtokensC
                                      new ChainSpecification.Inheritance(Set.of(), Set.of()),
                                      phases,
                                      Set.of()),
-              new LinkedHashMap<>());
+              new HashMap<>());
         addInnerComponent(new IndexingProcessor());
     }
 
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/search/IndexingProcessor.java b/config-model/src/main/java/com/yahoo/vespa/model/search/IndexingProcessor.java
index b939cb1b0c6..808fdccad2b 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/search/IndexingProcessor.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/search/IndexingProcessor.java
@@ -8,7 +8,7 @@ import com.yahoo.component.chain.dependencies.Dependencies;
 import com.yahoo.vespa.model.container.docproc.DocumentProcessor;
 import com.yahoo.vespa.model.container.docproc.model.DocumentProcessorModel;
 
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.List;
 
 /**
@@ -23,7 +23,7 @@ public class IndexingProcessor extends DocumentProcessor {
                                                                               new ComponentSpecification(DocumentProcessor.INDEXER),
                                                                               new ComponentSpecification(docprocsBundleSpecification)),
                                          new Dependencies(List.of(), List.of(), List.of()),
-                                         new LinkedHashMap<>()));
+                                         new HashMap<>()));
     }
 
 }
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/search/SearchNode.java b/config-model/src/main/java/com/yahoo/vespa/model/search/SearchNode.java
index c6ec65bb2ad..28d1fbe72ef 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/search/SearchNode.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/search/SearchNode.java
@@ -25,8 +25,7 @@ import com.yahoo.vespa.model.filedistribution.FileDistributionConfigProducer;
 import com.yahoo.vespa.model.filedistribution.FileDistributionConfigProvider;
 import org.w3c.dom.Element;
 
-import java.util.LinkedHashMap;
-import java.util.Map;
+import java.util.HashMap;
 import java.util.Optional;
 
 import static com.yahoo.vespa.defaults.Defaults.getDefaults;
@@ -293,8 +292,8 @@ public class SearchNode extends AbstractService implements
     }
 
     @Override
-    public Map<String, String> getDefaultMetricDimensions() {
-        Map<String, String> dimensions = new LinkedHashMap<>();
+    public HashMap<String, String> getDefaultMetricDimensions() {
+        HashMap<String, String> dimensions = new HashMap<>();
         if (clusterName != null) {
             dimensions.put("clustername", clusterName);
         }
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/utils/Duration.java b/config-model/src/main/java/com/yahoo/vespa/model/utils/Duration.java
index dbd20c8fa23..5bb6d8cf6bf 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/utils/Duration.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/utils/Duration.java
@@ -1,7 +1,7 @@
 // Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 package com.yahoo.vespa.model.utils;
 
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -21,7 +21,7 @@ import java.util.regex.Pattern;
  */
 public class Duration {
     private static Pattern pattern = Pattern.compile("([0-9\\.]+)\\s*([a-z]+)?");
-    private static Map<String, Integer> unitMultiplier = new LinkedHashMap<>();
+    private static Map<String, Integer> unitMultiplier = new HashMap<>();
     static {
         unitMultiplier.put("s", 1000);
         unitMultiplier.put("d", 1000 * 3600 * 24);
diff --git a/config-model/src/main/java/com/yahoo/vespa/model/utils/FileSender.java b/config-model/src/main/java/com/yahoo/vespa/model/utils/FileSender.java
index 5b682ad042f..ad10e15930b 100644
--- a/config-model/src/main/java/com/yahoo/vespa/model/utils/FileSender.java
+++ b/config-model/src/main/java/com/yahoo/vespa/model/utils/FileSender.java
@@ -14,7 +14,7 @@ import com.yahoo.vespa.model.AbstractService;
 
 import java.io.Serializable;
 import java.util.Collection;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.logging.Level;
 
@@ -43,7 +43,7 @@ public class FileSender implements Serializable {
             return;
 
         UserConfigRepo userConfigs = producer.getUserConfigs();
-        Map<String, FileReference> sentFiles = new LinkedHashMap<>();
+        Map<String, FileReference> sentFiles = new HashMap<>();
         for (ConfigDefinitionKey key : userConfigs.configsProduced()) {
             ConfigPayloadBuilder builder = userConfigs.get(key);
             try {