eae1804f29
Summary: shared_ptr is slower than unique_ptr (which literally comes with no performance cost compare with raw pointers). In memtable and memtable rep, we use shared_ptr when we'd actually should use unique_ptr. According to igor's previous work, we are likely to make quite some performance gain from this diff. Test Plan: make check Reviewers: dhruba, igor, sdong, haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D15213
39 lines
1.3 KiB
C++
39 lines
1.3 KiB
C++
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#pragma once
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#include "rocksdb/slice_transform.h"
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#include "rocksdb/memtablerep.h"
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namespace rocksdb {
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class HashSkipListRepFactory : public MemTableRepFactory {
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public:
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explicit HashSkipListRepFactory(const SliceTransform* transform,
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size_t bucket_count = 1000000)
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: transform_(transform),
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bucket_count_(bucket_count) { }
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virtual ~HashSkipListRepFactory() { delete transform_; }
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virtual MemTableRep* CreateMemTableRep(MemTableRep::KeyComparator& compare,
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Arena* arena) override;
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virtual const char* Name() const override {
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return "HashSkipListRepFactory";
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}
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const SliceTransform* GetTransform() { return transform_; }
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private:
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const SliceTransform* transform_;
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const size_t bucket_count_;
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};
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}
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