Use one MatchingElementsFields instance per summary class.

This avoids calculating MatchingElements for fields that exist in other summary classes.

4 files changed, 16 insertions, 10 deletions

diff --git a/searchsummary/src/vespa/searchsummary/docsummary/docsum_field_writer_factory.cpp b/searchsummary/src/vespa/searchsummary/docsummary/docsum_field_writer_factory.cpp
index d6f06c9161e..6ac4fea2921 100644
--- a/searchsummary/src/vespa/searchsummary/docsummary/docsum_field_writer_factory.cpp
+++ b/searchsummary/src/vespa/searchsummary/docsummary/docsum_field_writer_factory.cpp
@@ -23,8 +23,7 @@ namespace search::docsummary {
 DocsumFieldWriterFactory::DocsumFieldWriterFactory(bool use_v8_geo_positions, const IDocsumEnvironment& env, const IQueryTermFilterFactory& query_term_filter_factory)
     : _use_v8_geo_positions(use_v8_geo_positions),
       _env(env),
-      _query_term_filter_factory(query_term_filter_factory),
-      _matching_elems_fields(std::make_shared<MatchingElementsFields>())
+      _query_term_filter_factory(query_term_filter_factory)
 {
 }
 
@@ -58,7 +57,8 @@ throw_missing_source(const vespalib::string& command)
 std::unique_ptr<DocsumFieldWriter>
 DocsumFieldWriterFactory::create_docsum_field_writer(const vespalib::string& field_name,
                                                      const vespalib::string& command,
-                                                     const vespalib::string& source)
+                                                     const vespalib::string& source,
+                                                     std::shared_ptr<MatchingElementsFields> matching_elems_fields)
 {
     std::unique_ptr<DocsumFieldWriter> fieldWriter;
     if (command == command::dynamic_teaser) {
@@ -116,9 +116,9 @@ DocsumFieldWriterFactory::create_docsum_field_writer(const vespalib::string& fie
         if (has_attribute_manager()) {
             auto attr_ctx = getEnvironment().getAttributeManager()->createContext();
             if (attr_ctx->getAttribute(source_field) != nullptr) {
-                fieldWriter = AttributeDFWFactory::create(*getEnvironment().getAttributeManager(), source_field, true, _matching_elems_fields);
+                fieldWriter = AttributeDFWFactory::create(*getEnvironment().getAttributeManager(), source_field, true, matching_elems_fields);
             } else {
-                fieldWriter = AttributeCombinerDFW::create(source_field, *attr_ctx, true, _matching_elems_fields);
+                fieldWriter = AttributeCombinerDFW::create(source_field, *attr_ctx, true, matching_elems_fields);
             }
             throw_if_nullptr(fieldWriter, command);
         }
@@ -126,7 +126,7 @@ DocsumFieldWriterFactory::create_docsum_field_writer(const vespalib::string& fie
         const vespalib::string& source_field = source.empty() ? field_name : source;
         if (has_attribute_manager()) {
             auto attr_ctx = getEnvironment().getAttributeManager()->createContext();
-            fieldWriter = MatchedElementsFilterDFW::create(source_field,*attr_ctx, _matching_elems_fields);
+            fieldWriter = MatchedElementsFilterDFW::create(source_field,*attr_ctx, matching_elems_fields);
             throw_if_nullptr(fieldWriter, command);
         }
     } else if (command == command::documentid) {
diff --git a/searchsummary/src/vespa/searchsummary/docsummary/docsum_field_writer_factory.h b/searchsummary/src/vespa/searchsummary/docsummary/docsum_field_writer_factory.h
index e50fb85cca6..7175f043701 100644
--- a/searchsummary/src/vespa/searchsummary/docsummary/docsum_field_writer_factory.h
+++ b/searchsummary/src/vespa/searchsummary/docsummary/docsum_field_writer_factory.h
@@ -20,7 +20,6 @@ class DocsumFieldWriterFactory : public IDocsumFieldWriterFactory
     const IDocsumEnvironment& _env;
     const IQueryTermFilterFactory& _query_term_filter_factory;
 protected:
-    std::shared_ptr<MatchingElementsFields> _matching_elems_fields;
     const IDocsumEnvironment& getEnvironment() const noexcept { return _env; }
     bool has_attribute_manager() const noexcept;
 public:
@@ -28,7 +27,8 @@ public:
     ~DocsumFieldWriterFactory() override;
     std::unique_ptr<DocsumFieldWriter> create_docsum_field_writer(const vespalib::string& field_name,
                                                                   const vespalib::string& command,
-                                                                  const vespalib::string& source) override;
+                                                                  const vespalib::string& source,
+                                                                  std::shared_ptr<MatchingElementsFields> matching_elems_fields) override;
 };
 
 }
diff --git a/searchsummary/src/vespa/searchsummary/docsummary/i_docsum_field_writer_factory.h b/searchsummary/src/vespa/searchsummary/docsummary/i_docsum_field_writer_factory.h
index 6a5cd691857..bc2ebe3c40c 100644
--- a/searchsummary/src/vespa/searchsummary/docsummary/i_docsum_field_writer_factory.h
+++ b/searchsummary/src/vespa/searchsummary/docsummary/i_docsum_field_writer_factory.h
@@ -5,6 +5,8 @@
 #include <memory>
 #include <vespa/vespalib/stllike/string.h>
 
+namespace search { class MatchingElementsFields; }
+
 namespace search::docsummary {
 
 class DocsumFieldWriter;
@@ -21,7 +23,8 @@ public:
      */
     virtual std::unique_ptr<DocsumFieldWriter> create_docsum_field_writer(const vespalib::string& field_name,
                                                                           const vespalib::string& command,
-                                                                          const vespalib::string& source) = 0;
+                                                                          const vespalib::string& source,
+                                                                          std::shared_ptr<MatchingElementsFields> matching_elems_fields) = 0;
 };
 
 }
diff --git a/searchsummary/src/vespa/searchsummary/docsummary/resultconfig.cpp b/searchsummary/src/vespa/searchsummary/docsummary/resultconfig.cpp
index f620dcb1df5..eddb67f5822 100644
--- a/searchsummary/src/vespa/searchsummary/docsummary/resultconfig.cpp
+++ b/searchsummary/src/vespa/searchsummary/docsummary/resultconfig.cpp
@@ -5,6 +5,7 @@
 #include "docsum_field_writer_factory.h"
 #include "resultclass.h"
 #include <vespa/config-summary.h>
+#include <vespa/searchlib/common/matching_elements_fields.h>
 #include <vespa/vespalib/stllike/hash_map.hpp>
 #include <vespa/vespalib/util/exceptions.h>
 #include <atomic>
@@ -124,6 +125,7 @@ ResultConfig::readConfig(const SummaryConfig &cfg, const char *configId, IDocsum
             break;
         }
         resClass->set_omit_summary_features(cfg_class.omitsummaryfeatures);
+        auto matching_elems_fields = std::make_shared<MatchingElementsFields>();
         for (const auto & field : cfg_class.fields) {
             const char *fieldname = field.name.c_str();
             vespalib::string command = field.command;
@@ -134,7 +136,8 @@ ResultConfig::readConfig(const SummaryConfig &cfg, const char *configId, IDocsum
                 try {
                     docsum_field_writer = docsum_field_writer_factory.create_docsum_field_writer(fieldname,
                                                                                                  command,
-                                                                                                 source_name);
+                                                                                                 source_name,
+                                                                                                 matching_elems_fields);
                 } catch (const vespalib::IllegalArgumentException& ex) {
                     LOG(error, "Exception during setup of summary result class '%s': field='%s', command='%s', source='%s': %s",
                         cfg_class.name.c_str(), fieldname, command.c_str(), source_name.c_str(), ex.getMessage().c_str());