mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-26 07:30:54 +00:00
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.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same directory.
|
|
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#pragma once
|
|
#include "rocksdb/slice_transform.h"
|
|
#include "rocksdb/memtablerep.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
class HashSkipListRepFactory : public MemTableRepFactory {
|
|
public:
|
|
explicit HashSkipListRepFactory(const SliceTransform* transform,
|
|
size_t bucket_count = 1000000)
|
|
: transform_(transform),
|
|
bucket_count_(bucket_count) { }
|
|
|
|
virtual ~HashSkipListRepFactory() { delete transform_; }
|
|
|
|
virtual MemTableRep* CreateMemTableRep(MemTableRep::KeyComparator& compare,
|
|
Arena* arena) override;
|
|
|
|
virtual const char* Name() const override {
|
|
return "HashSkipListRepFactory";
|
|
}
|
|
|
|
const SliceTransform* GetTransform() { return transform_; }
|
|
|
|
private:
|
|
const SliceTransform* transform_;
|
|
const size_t bucket_count_;
|
|
};
|
|
|
|
}
|