Move BucketIdListResult

29 files changed, 136 insertions, 115 deletions

diff --git a/document/src/vespa/document/bucket/bucketid.cpp b/document/src/vespa/document/bucket/bucketid.cpp
index f78fdbe89dc..f01bfb67674 100644
--- a/document/src/vespa/document/bucket/bucketid.cpp
+++ b/document/src/vespa/document/bucket/bucketid.cpp
@@ -151,5 +151,4 @@ operator>>(nbostream &is, BucketId &bucketId)
 
 } // document
 
-template class vespalib::Array<document::BucketId>;
 VESPALIB_HASH_SET_INSTANTIATE_H(document::BucketId, document::BucketId::hash);
diff --git a/document/src/vespa/document/bucket/bucketidlist.cpp b/document/src/vespa/document/bucket/bucketidlist.cpp
index 26f2062e1c4..0f5d18f7b3a 100644
--- a/document/src/vespa/document/bucket/bucketidlist.cpp
+++ b/document/src/vespa/document/bucket/bucketidlist.cpp
@@ -4,9 +4,8 @@
 
 namespace document::bucket {
 
-BucketIdList::BucketIdList() { }
 BucketIdList::BucketIdList(const BucketIdList & rhs) = default;
 BucketIdList & BucketIdList::operator = (const BucketIdList &) = default;
-BucketIdList::~BucketIdList() { }
+BucketIdList::~BucketIdList() = default;
 
 }
diff --git a/document/src/vespa/document/bucket/bucketidlist.h b/document/src/vespa/document/bucket/bucketidlist.h
index c21879ff375..b6fdb51740a 100644
--- a/document/src/vespa/document/bucket/bucketidlist.h
+++ b/document/src/vespa/document/bucket/bucketidlist.h
@@ -3,17 +3,18 @@
 #pragma once
 
 #include "bucketid.h"
-#include <vespa/vespalib/util/array.h>
+#include <vespa/vespalib/stllike/allocator.h>
+#include <vector>
 
 namespace document::bucket {
 
-using BucketIdListT = vespalib::Array<BucketId>;
+using BucketIdListT = std::vector<BucketId, vespalib::allocator_large<BucketId>>;
 
 class BucketIdList : public BucketIdListT {
 public:
-    BucketIdList();
-    BucketIdList(BucketIdList && rhs) = default;
-    BucketIdList & operator = (BucketIdList &&) = default;
+    using BucketIdListT::BucketIdListT;
+    BucketIdList(BucketIdList && rhs) noexcept = default;
+    BucketIdList & operator = (BucketIdList &&) noexcept = default;
     BucketIdList(const BucketIdList & rhs);
     BucketIdList & operator = (const BucketIdList &);
     ~BucketIdList();
diff --git a/persistence/src/vespa/persistence/dummyimpl/dummypersistence.cpp b/persistence/src/vespa/persistence/dummyimpl/dummypersistence.cpp
index d947ca51f49..33770004aba 100644
--- a/persistence/src/vespa/persistence/dummyimpl/dummypersistence.cpp
+++ b/persistence/src/vespa/persistence/dummyimpl/dummypersistence.cpp
@@ -318,14 +318,14 @@ DummyPersistence::listBuckets(BucketSpace bucketSpace) const
             list.push_back(entry.first);
         }
     }
-    return BucketIdListResult(list);
+    return BucketIdListResult(std::move(list));
 }
 
 void
-DummyPersistence::setModifiedBuckets(const BucketIdListResult::List& buckets)
+DummyPersistence::setModifiedBuckets(BucketIdListResult::List buckets)
 {
     std::lock_guard lock(_monitor);
-    _modifiedBuckets = buckets;
+    _modifiedBuckets = std::move(buckets);
 }
 
 void DummyPersistence::set_fake_bucket_set(const std::vector<std::pair<Bucket, BucketInfo>>& fake_info) {
@@ -348,10 +348,10 @@ DummyPersistence::getModifiedBuckets(BucketSpace bucketSpace) const
 {
     std::lock_guard lock(_monitor);
     if (bucketSpace == FixedBucketSpaces::default_space()) {
-        return BucketIdListResult(_modifiedBuckets);
+        return BucketIdListResult(std::move(_modifiedBuckets));
     } else {
         BucketIdListResult::List emptyList;
-        return BucketIdListResult(emptyList);
+        return BucketIdListResult(BucketIdListResult::List());
     }
 }
 
diff --git a/persistence/src/vespa/persistence/dummyimpl/dummypersistence.h b/persistence/src/vespa/persistence/dummyimpl/dummypersistence.h
index 3b6fc9f1449..683a738255f 100644
--- a/persistence/src/vespa/persistence/dummyimpl/dummypersistence.h
+++ b/persistence/src/vespa/persistence/dummyimpl/dummypersistence.h
@@ -138,12 +138,12 @@ class DummyPersistence : public AbstractPersistenceProvider
 {
 public:
     DummyPersistence(const std::shared_ptr<const document::DocumentTypeRepo>& repo);
-    ~DummyPersistence();
+    ~DummyPersistence() override;
 
     Result initialize() override;
     BucketIdListResult listBuckets(BucketSpace bucketSpace) const override;
 
-    void setModifiedBuckets(const BucketIdListResult::List& result);
+    void setModifiedBuckets(BucketIdListResult::List result);
 
     // Important: any subsequent mutations to the bucket set in fake_info will reset
     // the bucket info due to implicit recalculation of bucket info.
diff --git a/persistence/src/vespa/persistence/spi/abstractpersistenceprovider.cpp b/persistence/src/vespa/persistence/spi/abstractpersistenceprovider.cpp
index 35654240ec7..6ee99e49798 100644
--- a/persistence/src/vespa/persistence/spi/abstractpersistenceprovider.cpp
+++ b/persistence/src/vespa/persistence/spi/abstractpersistenceprovider.cpp
@@ -18,8 +18,7 @@ AbstractPersistenceProvider::removeIfFoundAsync(const Bucket& b, Timestamp times
 BucketIdListResult
 AbstractPersistenceProvider::getModifiedBuckets(BucketSpace) const
 {
-    BucketIdListResult::List list;
-    return BucketIdListResult(list);
+    return BucketIdListResult(BucketIdListResult::List());
 }
 
 }
diff --git a/persistence/src/vespa/persistence/spi/result.h b/persistence/src/vespa/persistence/spi/result.h
index 10c589307ba..5046a380c86 100644
--- a/persistence/src/vespa/persistence/spi/result.h
+++ b/persistence/src/vespa/persistence/spi/result.h
@@ -71,7 +71,7 @@ std::ostream & operator << (std::ostream & os, const Result & r);
 
 std::ostream & operator << (std::ostream & os, const Result::ErrorType &errorCode);
 
-class BucketInfoResult : public Result {
+class BucketInfoResult final : public Result {
 public:
     /**
      * Constructor to use for a result where an error has been detected.
@@ -95,7 +95,7 @@ private:
     BucketInfo _info;
 };
 
-class UpdateResult : public Result
+class UpdateResult final : public Result
 {
 public:
     /**
@@ -151,7 +151,7 @@ private:
     uint32_t _numRemoved;
 };
 
-class GetResult : public Result {
+class GetResult final : public Result {
 public:
     /**
      * Constructor to use when there was an error retrieving the document.
@@ -173,6 +173,8 @@ public:
           _is_tombstone(false)
     {
     }
+    GetResult(GetResult &&) noexcept = default;
+    GetResult & operator=(GetResult &&) noexcept = default;
 
     /**
      * Constructor to use when we found the document asked for.
@@ -225,7 +227,7 @@ private:
     bool       _is_tombstone;
 };
 
-class BucketIdListResult : public Result {
+class BucketIdListResult final : public Result {
 public:
     using List = document::bucket::BucketIdList;
 
@@ -241,12 +243,16 @@ public:
      * @param list The list of bucket ids this partition has. Is swapped with
      * the list internal to this object.
      */
-    BucketIdListResult(List& list)
-        : Result()
-    {
-        _info.swap(list);
-    }
-
+    BucketIdListResult(List list)
+        : Result(),
+          _info(std::move(list))
+    { }
+    BucketIdListResult()
+        : Result(),
+          _info()
+    { }
+    BucketIdListResult(BucketIdListResult &&) noexcept = default;
+    BucketIdListResult & operator =(BucketIdListResult &&) noexcept = default;
     ~BucketIdListResult();
 
     const List& getList() const { return _info; }
@@ -278,7 +284,7 @@ private:
     IteratorId _iterator;
 };
 
-class IterateResult : public Result {
+class IterateResult final : public Result {
 public:
     using List = std::vector<std::unique_ptr<DocEntry>>;
 
diff --git a/searchcore/src/tests/proton/persistenceengine/persistence_handler_map/persistence_handler_map_test.cpp b/searchcore/src/tests/proton/persistenceengine/persistence_handler_map/persistence_handler_map_test.cpp
index e8cc1b54235..ff65de90c4a 100644
--- a/searchcore/src/tests/proton/persistenceengine/persistence_handler_map/persistence_handler_map_test.cpp
+++ b/searchcore/src/tests/proton/persistenceengine/persistence_handler_map/persistence_handler_map_test.cpp
@@ -30,7 +30,7 @@ struct DummyPersistenceHandler : public IPersistenceHandler {
 
     RetrieversSP getDocumentRetrievers(storage::spi::ReadConsistency) override { return RetrieversSP(); }
     void handleListActiveBuckets(IBucketIdListResultHandler &) override {}
-    void handlePopulateActiveBuckets(document::BucketId::List &, IGenericResultHandler &) override {}
+    void handlePopulateActiveBuckets(document::BucketId::List, IGenericResultHandler &) override {}
 };
 
 BucketSpace space_1(1);
diff --git a/searchcore/src/tests/proton/persistenceengine/persistenceengine_test.cpp b/searchcore/src/tests/proton/persistenceengine/persistenceengine_test.cpp
index ce0b09a48b8..6e7e50ee4f9 100644
--- a/searchcore/src/tests/proton/persistenceengine/persistenceengine_test.cpp
+++ b/searchcore/src/tests/proton/persistenceengine/persistenceengine_test.cpp
@@ -217,7 +217,7 @@ struct MyHandler : public IPersistenceHandler, IBucketFreezer {
     }
 
     void handleListBuckets(IBucketIdListResultHandler &resultHandler) override {
-        resultHandler.handle(BucketIdListResult(bucketList));
+        resultHandler.handle(BucketIdListResult(BucketId::List(bucketList.begin(), bucketList.end())));
     }
 
     void handleSetClusterState(const ClusterState &calc, IGenericResultHandler &resultHandler) override {
@@ -245,7 +245,7 @@ struct MyHandler : public IPersistenceHandler, IBucketFreezer {
     }
 
     void handleGetModifiedBuckets(IBucketIdListResultHandler &resultHandler) override {
-        resultHandler.handle(BucketIdListResult(modBucketList));
+        resultHandler.handle(BucketIdListResult(std::move(modBucketList)));
     }
 
     void handleSplit(FeedToken token, const storage::spi::Bucket &, const storage::spi::Bucket &,
@@ -262,17 +262,16 @@ struct MyHandler : public IPersistenceHandler, IBucketFreezer {
 
     RetrieversSP getDocumentRetrievers(storage::spi::ReadConsistency) override {
         RetrieversSP ret(new std::vector<IDocumentRetriever::SP>);
-        ret->push_back(IDocumentRetriever::SP(new MyDocumentRetriever(nullptr, Timestamp(), lastDocId)));
-        ret->push_back(IDocumentRetriever::SP(new MyDocumentRetriever(document, existingTimestamp, lastDocId)));
+        ret->push_back(std::make_unique<MyDocumentRetriever>(nullptr, Timestamp(), lastDocId));
+        ret->push_back(std::make_unique<MyDocumentRetriever>(document, existingTimestamp, lastDocId));
         return ret;
     }
 
     void handleListActiveBuckets(IBucketIdListResultHandler &resultHandler) override {
-        BucketIdListResult::List list;
-        resultHandler.handle(BucketIdListResult(list));
+        resultHandler.handle(BucketIdListResult());
     }
 
-    void handlePopulateActiveBuckets(document::BucketId::List &buckets, IGenericResultHandler &resultHandler) override {
+    void handlePopulateActiveBuckets(document::BucketId::List buckets, IGenericResultHandler &resultHandler) override {
         (void) buckets;
         resultHandler.handle(Result());
     }
diff --git a/searchcore/src/vespa/searchcore/proton/bucketdb/bucketdb.cpp b/searchcore/src/vespa/searchcore/proton/bucketdb/bucketdb.cpp
index c7a3103af22..37d04f6bcb9 100644
--- a/searchcore/src/vespa/searchcore/proton/bucketdb/bucketdb.cpp
+++ b/searchcore/src/vespa/searchcore/proton/bucketdb/bucketdb.cpp
@@ -225,25 +225,26 @@ BucketDB::deleteEmptyBucket(const BucketId &bucketId)
     }
 }
 
-void
-BucketDB::getActiveBuckets(BucketId::List &buckets) const
+document::BucketId::List
+BucketDB::getActiveBuckets() const
 {
+    BucketId::List buckets;
     for (const auto & entry : _map) {
         if (entry.second.isActive()) {
             buckets.push_back(entry.first);
         }
     }
+    return buckets;
 }
 
-void
-BucketDB::populateActiveBuckets(const BucketId::List &buckets, BucketId::List &fixupBuckets)
+document::BucketId::List
+BucketDB::populateActiveBuckets(BucketId::List buckets)
 {
-    typedef BucketId::List BIV;
-    BIV sorted(buckets);
-    BIV toAdd;
-    std::sort(sorted.begin(), sorted.end());
-    auto si = sorted.begin();
-    auto se = sorted.end();
+    BucketId::List toAdd;
+    BucketId::List fixupBuckets;
+    std::sort(buckets.begin(), buckets.end());
+    auto si = buckets.begin();
+    auto se = buckets.end();
     for (const auto & entry : _map) {
         for (; si != se && !(entry.first < *si); ++si) {
             if (*si < entry.first) {
@@ -263,6 +264,7 @@ BucketDB::populateActiveBuckets(const BucketId::List &buckets, BucketId::List &f
         InsertResult ins(_map.emplace(bucketId, activeState));
         assert(ins.second);
     }
+    return fixupBuckets;
 }
 
 }
diff --git a/searchcore/src/vespa/searchcore/proton/bucketdb/bucketdb.h b/searchcore/src/vespa/searchcore/proton/bucketdb/bucketdb.h
index 2ea7594bde1..6fe46d97f46 100644
--- a/searchcore/src/vespa/searchcore/proton/bucketdb/bucketdb.h
+++ b/searchcore/src/vespa/searchcore/proton/bucketdb/bucketdb.h
@@ -63,8 +63,8 @@ public:
     void setBucketState(const BucketId &bucketId, bool active);
     void createBucket(const BucketId &bucketId);
     void deleteEmptyBucket(const BucketId &bucketId);
-    void getActiveBuckets(BucketId::List &buckets) const;
-    void populateActiveBuckets(const BucketId::List &buckets, BucketId::List &fixupBuckets);
+    BucketId::List getActiveBuckets() const;
+    BucketId::List populateActiveBuckets(BucketId::List buckets);
 
     ConstMapIterator begin() const { return _map.begin(); }
     ConstMapIterator end() const { return _map.end(); }
diff --git a/searchcore/src/vespa/searchcore/proton/documentmetastore/documentmetastore.cpp b/searchcore/src/vespa/searchcore/proton/documentmetastore/documentmetastore.cpp
index 28234730f7b..2e6a7087b69 100644
--- a/searchcore/src/vespa/searchcore/proton/documentmetastore/documentmetastore.cpp
+++ b/searchcore/src/vespa/searchcore/proton/documentmetastore/documentmetastore.cpp
@@ -982,12 +982,9 @@ DocumentMetaStore::updateActiveLids(const BucketId &bucketId, bool active)
 }
 
 void
-DocumentMetaStore::populateActiveBuckets(const BucketId::List &buckets)
+DocumentMetaStore::populateActiveBuckets(BucketId::List buckets)
 {
-    typedef BucketId::List BIV;
-    BIV fixupBuckets;
-
-    _bucketDB->takeGuard()->populateActiveBuckets(buckets, fixupBuckets);
+    BucketId::List fixupBuckets = _bucketDB->takeGuard()->populateActiveBuckets(std::move(buckets));
 
     for (const auto &bucketId : fixupBuckets) {
         updateActiveLids(bucketId, true);
diff --git a/searchcore/src/vespa/searchcore/proton/documentmetastore/documentmetastore.h b/searchcore/src/vespa/searchcore/proton/documentmetastore/documentmetastore.h
index 9e4977c65e1..5cb0b1469fd 100644
--- a/searchcore/src/vespa/searchcore/proton/documentmetastore/documentmetastore.h
+++ b/searchcore/src/vespa/searchcore/proton/documentmetastore/documentmetastore.h
@@ -233,7 +233,7 @@ public:
     bucketdb::BucketDeltaPair handleSplit(const bucketdb::SplitBucketSession &session) override;
     bucketdb::BucketDeltaPair handleJoin(const bucketdb::JoinBucketsSession &session) override;
     void setBucketState(const BucketId &bucketId, bool active) override;
-    void populateActiveBuckets(const BucketId::List &buckets) override;
+    void populateActiveBuckets(BucketId::List buckets) override;
     ConstIterator beginFrozen() const;
 
     const vespalib::GenerationHandler & getGenerationHandler() const {
diff --git a/searchcore/src/vespa/searchcore/proton/documentmetastore/i_bucket_handler.h b/searchcore/src/vespa/searchcore/proton/documentmetastore/i_bucket_handler.h
index bb8c860b56e..1a0288fea84 100644
--- a/searchcore/src/vespa/searchcore/proton/documentmetastore/i_bucket_handler.h
+++ b/searchcore/src/vespa/searchcore/proton/documentmetastore/i_bucket_handler.h
@@ -52,7 +52,7 @@ struct IBucketHandler
      * Sets the bucket state to active, used when adding document db as
      * part of live reconfig.
      **/
-    virtual void populateActiveBuckets(const BucketId::List &buckets) = 0;
+    virtual void populateActiveBuckets(BucketId::List buckets) = 0;
 
 };
 
diff --git a/searchcore/src/vespa/searchcore/proton/persistenceengine/ipersistencehandler.h b/searchcore/src/vespa/searchcore/proton/persistenceengine/ipersistencehandler.h
index b393a85f632..1edecc59136 100644
--- a/searchcore/src/vespa/searchcore/proton/persistenceengine/ipersistencehandler.h
+++ b/searchcore/src/vespa/searchcore/proton/persistenceengine/ipersistencehandler.h
@@ -70,7 +70,7 @@ public:
 
     virtual void handleListActiveBuckets(IBucketIdListResultHandler &resultHandler) = 0;
 
-    virtual void handlePopulateActiveBuckets(document::BucketId::List &buckets, IGenericResultHandler &resultHandler) = 0;
+    virtual void handlePopulateActiveBuckets(document::BucketId::List buckets, IGenericResultHandler &resultHandler) = 0;
 };
 
 } // namespace proton
diff --git a/searchcore/src/vespa/searchcore/proton/persistenceengine/persistenceengine.cpp b/searchcore/src/vespa/searchcore/proton/persistenceengine/persistenceengine.cpp
index 7e21e619419..94882bfadf5 100644
--- a/searchcore/src/vespa/searchcore/proton/persistenceengine/persistenceengine.cpp
+++ b/searchcore/src/vespa/searchcore/proton/persistenceengine/persistenceengine.cpp
@@ -107,19 +107,21 @@ public:
         : _bucketSet()
     { }
     ~BucketIdListResultHandler() override;
-    void handle(const BucketIdListResult &result) override {
+    void
+    handle(BucketIdListResult result) override {
         const BucketIdListResult::List &buckets = result.getList();
         for (size_t i = 0; i < buckets.size(); ++i) {
             _bucketSet.insert(buckets[i]);
         }
     }
-    std::unique_ptr<BucketIdListResult> getResult() const {
+    std::unique_ptr<BucketIdListResult>
+    getResult() const {
         BucketIdListResult::List buckets;
         buckets.reserve(_bucketSet.size());
         for (document::BucketId bucketId : _bucketSet) {
             buckets.push_back(bucketId);
         }
-        return std::make_unique<BucketIdListResult>(buckets);
+        return std::make_unique<BucketIdListResult>(std::move(buckets));
     }
 };
 
@@ -139,10 +141,10 @@ public:
         }
     }
     ~SynchronizedBucketIdListResultHandler() override;
-    void handle(const BucketIdListResult &result) override {
+    void handle(BucketIdListResult result) override {
         {
             std::lock_guard<std::mutex> guard(_lock);
-            BucketIdListResultHandler::handle(result);
+            BucketIdListResultHandler::handle(std::move(result));
         }
         countDown();
     }
@@ -283,7 +285,7 @@ PersistenceEngine::listBuckets(BucketSpace bucketSpace) const
         IPersistenceHandler *handler = snap.handlers().get();
         handler->handleListBuckets(resultHandler);
     }
-    return *resultHandler.getResult();
+    return std::move(*resultHandler.getResult());
 }
 
 
@@ -641,10 +643,10 @@ PersistenceEngine::getModifiedBuckets(BucketSpace bucketSpace) const
         IPersistenceHandler *handler = snap.handlers().get();
         handler->handleGetModifiedBuckets(resultHandler);
     }
-    for (const auto & item : extraModifiedBuckets) {
-        resultHandler.handle(*item);
+    for (auto & item : extraModifiedBuckets) {
+        resultHandler.handle(std::move(*item));
     }
-    return dynamic_cast<BucketIdListResult &>(*futureResult.get());
+    return std::move(dynamic_cast<BucketIdListResult &>(*futureResult.get()));
 }
 
 
@@ -763,7 +765,7 @@ private:
 public:
     ActiveBucketIdListResultHandler() : _bucketMap() { }
 
-    void handle(const BucketIdListResult &result) override {
+    void handle(BucketIdListResult result) override {
         const BucketIdListResult::List &buckets = result.getList();
         for (size_t i = 0; i < buckets.size(); ++i) {
             IR ir(_bucketMap.insert(std::make_pair(buckets[i], 1u)));
@@ -805,7 +807,7 @@ PersistenceEngine::populateInitialBucketDB(const WriteGuard & guard, BucketSpace
     auto catchResult = std::make_unique<storage::spi::CatchResult>();
     auto futureResult = catchResult->future_result();
     GenericResultHandler trHandler(1, std::move(catchResult));
-    targetHandler.handlePopulateActiveBuckets(buckets, trHandler);
+    targetHandler.handlePopulateActiveBuckets(std::move(buckets), trHandler);
     futureResult.get();
 }
 
diff --git a/searchcore/src/vespa/searchcore/proton/persistenceengine/resulthandler.h b/searchcore/src/vespa/searchcore/proton/persistenceengine/resulthandler.h
index 27b1fc8bdd0..897ff75c7b3 100644
--- a/searchcore/src/vespa/searchcore/proton/persistenceengine/resulthandler.h
+++ b/searchcore/src/vespa/searchcore/proton/persistenceengine/resulthandler.h
@@ -9,12 +9,12 @@ template <typename ResultType>
 class IResultHandler {
 public:
     virtual ~IResultHandler() = default;
-    virtual void handle(const ResultType &result) = 0;
+    virtual void handle(ResultType result) = 0;
 };
 
 using IBucketIdListResultHandler = IResultHandler<storage::spi::BucketIdListResult>;
-using IBucketInfoResultHandler = IResultHandler<storage::spi::BucketInfoResult>;
-using IGenericResultHandler = IResultHandler<storage::spi::Result>;
+using IBucketInfoResultHandler = IResultHandler<const storage::spi::BucketInfoResult &>;
+using IGenericResultHandler = IResultHandler<const storage::spi::Result &>;
 
 } // namespace proton
 
diff --git a/searchcore/src/vespa/searchcore/proton/server/buckethandler.cpp b/searchcore/src/vespa/searchcore/proton/server/buckethandler.cpp
index 0d9b2f6aaf6..d9201ce5b9e 100644
--- a/searchcore/src/vespa/searchcore/proton/server/buckethandler.cpp
+++ b/searchcore/src/vespa/searchcore/proton/server/buckethandler.cpp
@@ -46,15 +46,14 @@ void
 BucketHandler::performPopulateActiveBuckets(document::BucketId::List buckets,
                                             IGenericResultHandler *resultHandler)
 {
-    _ready->populateActiveBuckets(buckets);
+    _ready->populateActiveBuckets(std::move(buckets));
     resultHandler->handle(Result());
 }
 
 void
 BucketHandler::deactivateAllActiveBuckets()
 {
-    BucketId::List buckets;
-    _ready->getBucketDB().takeGuard()->getActiveBuckets(buckets);
+    BucketId::List buckets = _ready->getBucketDB().takeGuard()->getActiveBuckets();
     for (auto bucketId : buckets) {
         _ready->setBucketState(bucketId, storage::spi::BucketInfo::NOT_ACTIVE);
         // Don't notify bucket state changed, node is marked down so
@@ -93,7 +92,7 @@ BucketHandler::handleListBuckets(IBucketIdListResultHandler &resultHandler)
     // master write thread in document database.
     BucketIdListResult::List buckets;
     _ready->getBucketDB().takeGuard()->getBuckets(buckets);
-    resultHandler.handle(BucketIdListResult(buckets));
+    resultHandler.handle(BucketIdListResult(std::move(buckets)));
 }
 
 void
@@ -130,17 +129,16 @@ BucketHandler::handleListActiveBuckets(IBucketIdListResultHandler &resultHandler
     // Called by SPI thread.
     // BucketDBOwner ensures synchronization between SPI thread and
     // master write thread in document database.
-    BucketIdListResult::List buckets;
-    _ready->getBucketDB().takeGuard()->getActiveBuckets(buckets);
-    resultHandler.handle(BucketIdListResult(buckets));
+
+    resultHandler.handle(BucketIdListResult(_ready->getBucketDB().takeGuard()->getActiveBuckets()));
 }
 
 void
-BucketHandler::handlePopulateActiveBuckets(document::BucketId::List &buckets,
+BucketHandler::handlePopulateActiveBuckets(document::BucketId::List buckets,
                                            IGenericResultHandler &resultHandler)
 {
-    _executor.execute(makeLambdaTask([this, buckets, &resultHandler]() {
-        performPopulateActiveBuckets(std::move(buckets), &resultHandler);
+    _executor.execute(makeLambdaTask([this, moved_buckets=std::move(buckets), &resultHandler]() mutable {
+        performPopulateActiveBuckets(std::move(moved_buckets), &resultHandler);
     }));
 }
 
diff --git a/searchcore/src/vespa/searchcore/proton/server/buckethandler.h b/searchcore/src/vespa/searchcore/proton/server/buckethandler.h
index 2344e080450..79c6e929a51 100644
--- a/searchcore/src/vespa/searchcore/proton/server/buckethandler.h
+++ b/searchcore/src/vespa/searchcore/proton/server/buckethandler.h
@@ -60,7 +60,7 @@ public:
     void handleGetBucketInfo(const storage::spi::Bucket &bucket,
                              IBucketInfoResultHandler &resultHandler);
     void handleListActiveBuckets(IBucketIdListResultHandler &resultHandler);
-    void handlePopulateActiveBuckets(document::BucketId::List &buckets,
+    void handlePopulateActiveBuckets(document::BucketId::List buckets,
                                      IGenericResultHandler &resultHandler);
     bool hasBucket(const storage::spi::Bucket &bucket);
 
diff --git a/searchcore/src/vespa/searchcore/proton/server/clusterstatehandler.cpp b/searchcore/src/vespa/searchcore/proton/server/clusterstatehandler.cpp
index 20cd4ced6b2..e7142fb5bde 100644
--- a/searchcore/src/vespa/searchcore/proton/server/clusterstatehandler.cpp
+++ b/searchcore/src/vespa/searchcore/proton/server/clusterstatehandler.cpp
@@ -75,10 +75,7 @@ ClusterStateHandler::performSetClusterState(const ClusterState *calc, IGenericRe
 void
 ClusterStateHandler::performGetModifiedBuckets(IBucketIdListResultHandler *resultHandler)
 {
-    storage::spi::BucketIdListResult::List modifiedBuckets;
-    modifiedBuckets.resize(_modifiedBuckets.size());
-    std::copy(_modifiedBuckets.begin(), _modifiedBuckets.end(),
-              modifiedBuckets.begin());
+    storage::spi::BucketIdListResult::List modifiedBuckets(_modifiedBuckets.begin(), _modifiedBuckets.end());
 
     if (LOG_WOULD_LOG(debug) && !modifiedBuckets.empty()) {
         std::ostringstream oss;
@@ -91,7 +88,7 @@ ClusterStateHandler::performGetModifiedBuckets(IBucketIdListResultHandler *resul
         LOG(debug, "performGetModifiedBuckets(): modifiedBuckets(%zu): %s",
             modifiedBuckets.size(), oss.str().c_str());
     }
-    resultHandler->handle(BucketIdListResult(modifiedBuckets));
+    resultHandler->handle(BucketIdListResult(std::move(modifiedBuckets)));
     _modifiedBuckets.clear();
 }
 
diff --git a/searchcore/src/vespa/searchcore/proton/server/persistencehandlerproxy.cpp b/searchcore/src/vespa/searchcore/proton/server/persistencehandlerproxy.cpp
index bec9197501b..021460e6ecc 100644
--- a/searchcore/src/vespa/searchcore/proton/server/persistencehandlerproxy.cpp
+++ b/searchcore/src/vespa/searchcore/proton/server/persistencehandlerproxy.cpp
@@ -133,9 +133,9 @@ PersistenceHandlerProxy::handleListActiveBuckets(IBucketIdListResultHandler &res
 }
 
 void
-PersistenceHandlerProxy::handlePopulateActiveBuckets(document::BucketId::List &buckets, IGenericResultHandler &resultHandler)
+PersistenceHandlerProxy::handlePopulateActiveBuckets(document::BucketId::List buckets, IGenericResultHandler &resultHandler)
 {
-    _bucketHandler.handlePopulateActiveBuckets(buckets, resultHandler);
+    _bucketHandler.handlePopulateActiveBuckets(std::move(buckets), resultHandler);
 }
 
 } // namespace proton
diff --git a/searchcore/src/vespa/searchcore/proton/server/persistencehandlerproxy.h b/searchcore/src/vespa/searchcore/proton/server/persistencehandlerproxy.h
index 5c35434aae8..c438a777f1b 100644
--- a/searchcore/src/vespa/searchcore/proton/server/persistencehandlerproxy.h
+++ b/searchcore/src/vespa/searchcore/proton/server/persistencehandlerproxy.h
@@ -57,7 +57,7 @@ public:
 
     void handleListActiveBuckets(IBucketIdListResultHandler &resultHandler) override;
 
-    void handlePopulateActiveBuckets(document::BucketId::List &buckets, IGenericResultHandler &resultHandler) override;
+    void handlePopulateActiveBuckets(document::BucketId::List buckets, IGenericResultHandler &resultHandler) override;
 };
 
 } // namespace proton
diff --git a/searchcore/src/vespa/searchcore/proton/test/CMakeLists.txt b/searchcore/src/vespa/searchcore/proton/test/CMakeLists.txt
index abc8c8450e4..3a2e443bfef 100644
--- a/searchcore/src/vespa/searchcore/proton/test/CMakeLists.txt
+++ b/searchcore/src/vespa/searchcore/proton/test/CMakeLists.txt
@@ -11,6 +11,7 @@ vespa_add_library(searchcore_test STATIC
     mock_index_manager.cpp
     mock_shared_threading_service.cpp
     userdocumentsbuilder.cpp
+    resulthandler.cpp
     threading_service_observer.cpp
     transport_helper.cpp
     DEPENDS
diff --git a/searchcore/src/vespa/searchcore/proton/test/bucketstatecalculator.h b/searchcore/src/vespa/searchcore/proton/test/bucketstatecalculator.h
index d8803fd9c27..c773ae32b3f 100644
--- a/searchcore/src/vespa/searchcore/proton/test/bucketstatecalculator.h
+++ b/searchcore/src/vespa/searchcore/proton/test/bucketstatecalculator.h
@@ -5,6 +5,7 @@
 #include <vespa/document/bucket/bucketidlist.h>
 #include <vespa/document/bucket/bucket.h>
 #include <set>
+#include <memory>
 
 namespace proton::test {
 
@@ -23,8 +24,8 @@ private:
     bool                   _nodeMaintenance;
 
 public:
-    typedef std::shared_ptr<BucketStateCalculator> SP;
-    BucketStateCalculator() :
+    using SP = std::shared_ptr<BucketStateCalculator>;
+    BucketStateCalculator() noexcept :
         _ready(),
         _asked(),
         _clusterUp(true),
@@ -33,6 +34,8 @@ public:
         _nodeMaintenance(false)
     {
     }
+    BucketStateCalculator(BucketStateCalculator &&) noexcept = default;
+    BucketStateCalculator & operator =(BucketStateCalculator &&) noexcept = default;
     ~BucketStateCalculator() override;
     BucketStateCalculator &addReady(const document::BucketId &bucket) {
         _ready.insert(bucket);
diff --git a/searchcore/src/vespa/searchcore/proton/test/document_meta_store_observer.h b/searchcore/src/vespa/searchcore/proton/test/document_meta_store_observer.h
index 0386cb141ee..b9dacf61af8 100644
--- a/searchcore/src/vespa/searchcore/proton/test/document_meta_store_observer.h
+++ b/searchcore/src/vespa/searchcore/proton/test/document_meta_store_observer.h
@@ -115,8 +115,8 @@ struct DocumentMetaStoreObserver : public IDocumentMetaStore
     void setBucketState(const BucketId &bucketId, bool active) override {
         _store.setBucketState(bucketId, active);
     }
-    void populateActiveBuckets(const document::BucketId::List &buckets) override {
-        _store.populateActiveBuckets(buckets);
+    void populateActiveBuckets(document::BucketId::List buckets) override {
+        _store.populateActiveBuckets(std::move(buckets));
     }
 
 
diff --git a/searchcore/src/vespa/searchcore/proton/test/resulthandler.cpp b/searchcore/src/vespa/searchcore/proton/test/resulthandler.cpp
new file mode 100644
index 00000000000..00102aeab25
--- /dev/null
+++ b/searchcore/src/vespa/searchcore/proton/test/resulthandler.cpp
@@ -0,0 +1,27 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include "resulthandler.h"
+
+namespace proton::test {
+
+GenericResultHandler::~GenericResultHandler() = default;
+
+void
+GenericResultHandler::handle(const storage::spi::Result &result) {
+    _result = std::make_unique<storage::spi::Result>(result);
+}
+
+BucketInfoResultHandler::~BucketInfoResultHandler() = default;
+void
+BucketInfoResultHandler::handle(const storage::spi::BucketInfoResult &result) {
+    _result = std::make_unique<storage::spi::BucketInfoResult>(result);
+}
+
+BucketIdListResultHandler::~BucketIdListResultHandler() = default;
+
+void
+BucketIdListResultHandler::handle(storage::spi::BucketIdListResult result) {
+    _result = std::make_unique<storage::spi::BucketIdListResult>(std::move(result));
+}
+
+}
diff --git a/searchcore/src/vespa/searchcore/proton/test/resulthandler.h b/searchcore/src/vespa/searchcore/proton/test/resulthandler.h
index 00896cb84fe..d5954e30678 100644
--- a/searchcore/src/vespa/searchcore/proton/test/resulthandler.h
+++ b/searchcore/src/vespa/searchcore/proton/test/resulthandler.h
@@ -3,19 +3,16 @@
 
 #include <vespa/searchcore/proton/persistenceengine/resulthandler.h>
 
-namespace proton {
-
-namespace test {
+namespace proton::test {
 
 class GenericResultHandler : public IGenericResultHandler
 {
 private:
     std::unique_ptr<storage::spi::Result> _result;
 public:
-    void handle(const storage::spi::Result &result) override {
-        _result.reset(new storage::spi::Result(result));
-    }
-    bool valid() const { return _result.get() != NULL; }
+    ~GenericResultHandler() override;
+    void handle(const storage::spi::Result &result) override;
+    bool valid() const { return static_cast<bool>(_result); }
     const storage::spi::Result &getResult() const { return *_result; }
 };
 
@@ -25,10 +22,9 @@ class BucketInfoResultHandler : public IBucketInfoResultHandler
 private:
     std::unique_ptr<storage::spi::BucketInfoResult> _result;
 public:
-    void handle(const storage::spi::BucketInfoResult &result) override {
-        _result.reset(new storage::spi::BucketInfoResult(result));
-    }
-    bool valid() const { return _result.get() != NULL; }
+    ~BucketInfoResultHandler() override;
+    void handle(const storage::spi::BucketInfoResult &result) override;
+    bool valid() const { return static_cast<bool>(_result); }
     const storage::spi::BucketInfoResult &getResult() const { return *_result; }
     const storage::spi::BucketInfo &getInfo() const { return getResult().getBucketInfo(); }
 };
@@ -39,16 +35,11 @@ class BucketIdListResultHandler : public IBucketIdListResultHandler
 private:
     std::unique_ptr<storage::spi::BucketIdListResult> _result;
 public:
-    void handle(const storage::spi::BucketIdListResult &result) override {
-        _result.reset(new storage::spi::BucketIdListResult(result));
-    }
-    bool valid() const { return _result.get() != NULL; }
+    ~BucketIdListResultHandler() override;
+    void handle(storage::spi::BucketIdListResult result) override;
+    bool valid() const { return static_cast<bool>(_result); }
     const storage::spi::BucketIdListResult &getResult() const { return *_result; }
     const storage::spi::BucketIdListResult::List &getList() const { return getResult().getList(); }
 };
 
-
-} // namespace test
-
-} // namespace proton
-
+}
diff --git a/storage/src/tests/persistence/filestorage/filestormodifiedbucketstest.cpp b/storage/src/tests/persistence/filestorage/filestormodifiedbucketstest.cpp
index 3a1f41cb82c..8ce1ce4ea03 100644
--- a/storage/src/tests/persistence/filestorage/filestormodifiedbucketstest.cpp
+++ b/storage/src/tests/persistence/filestorage/filestormodifiedbucketstest.cpp
@@ -67,7 +67,7 @@ FileStorModifiedBucketsTest::modifyBuckets(uint32_t first, uint32_t count)
                 spi::BucketInfo::ACTIVE);
     }
 
-    getDummyPersistence().setModifiedBuckets(buckets); 
+    getDummyPersistence().setModifiedBuckets(std::move(buckets));
 }
 
 TEST_F(FileStorModifiedBucketsTest, modified_buckets_send_notify_bucket_change) {
diff --git a/storage/src/tests/persistence/filestorage/modifiedbucketcheckertest.cpp b/storage/src/tests/persistence/filestorage/modifiedbucketcheckertest.cpp
index 55fd2680832..ae1ac2d65b4 100644
--- a/storage/src/tests/persistence/filestorage/modifiedbucketcheckertest.cpp
+++ b/storage/src/tests/persistence/filestorage/modifiedbucketcheckertest.cpp
@@ -69,7 +69,7 @@ ModifiedBucketCheckerTest::modifyBuckets(uint32_t count, uint32_t firstBucket)
     for (uint32_t i = firstBucket; i < firstBucket + count; ++i) {
         buckets.push_back(document::BucketId(16, i));
     }
-    getDummyPersistence().setModifiedBuckets(buckets);
+    getDummyPersistence().setModifiedBuckets(std::move(buckets));
 }
 
 void