30b48cb1b3
I've put some work into the Google Benchmark library in order to make it easier to benchmark libc++. These changes have already been upstreamed into Google Benchmark and this patch applies the changes to the in-tree version. The main improvement in the addition of a 'compare_bench.py' script which makes it very easy to compare benchmarks. For example to compare the native STL to libc++ you would run: `$ compare_bench.py ./util_smartptr.native.out ./util_smartptr.libcxx.out` And the output would look like: RUNNING: ./util_smartptr.native.out Benchmark Time CPU Iterations ---------------------------------------------------------------- BM_SharedPtrCreateDestroy 62 ns 62 ns 10937500 BM_SharedPtrIncDecRef 31 ns 31 ns 23972603 BM_WeakPtrIncDecRef 28 ns 28 ns 23648649 RUNNING: ./util_smartptr.libcxx.out Benchmark Time CPU Iterations ---------------------------------------------------------------- BM_SharedPtrCreateDestroy 46 ns 46 ns 14957265 BM_SharedPtrIncDecRef 31 ns 31 ns 22435897 BM_WeakPtrIncDecRef 34 ns 34 ns 21084337 Comparing ./util_smartptr.native.out to ./util_smartptr.libcxx.out Benchmark Time CPU ----------------------------------------------------- BM_SharedPtrCreateDestroy -0.26 -0.26 BM_SharedPtrIncDecRef +0.00 +0.00 BM_WeakPtrIncDecRef +0.21 +0.21 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@278147 91177308-0d34-0410-b5e6-96231b3b80d8
65 lines
2.0 KiB
C++
65 lines
2.0 KiB
C++
// Copyright 2015 Google Inc. All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
#ifndef BENCHMARK_MACROS_H_
|
|
#define BENCHMARK_MACROS_H_
|
|
|
|
#if __cplusplus >= 201103L
|
|
#define BENCHMARK_HAS_CXX11
|
|
#endif
|
|
|
|
#ifndef BENCHMARK_HAS_CXX11
|
|
# define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
|
|
TypeName(const TypeName&); \
|
|
TypeName& operator=(const TypeName&)
|
|
#else
|
|
# define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
|
|
TypeName(const TypeName&) = delete; \
|
|
TypeName& operator=(const TypeName&) = delete
|
|
#endif
|
|
|
|
#if defined(__GNUC__)
|
|
# define BENCHMARK_UNUSED __attribute__((unused))
|
|
# define BENCHMARK_ALWAYS_INLINE __attribute__((always_inline))
|
|
# define BENCHMARK_NOEXCEPT noexcept
|
|
# define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
|
|
#elif defined(_MSC_VER) && !defined(__clang__)
|
|
# define BENCHMARK_UNUSED
|
|
# define BENCHMARK_ALWAYS_INLINE __forceinline
|
|
# if _MSC_VER >= 1900
|
|
# define BENCHMARK_NOEXCEPT noexcept
|
|
# define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
|
|
# else
|
|
# define BENCHMARK_NOEXCEPT
|
|
# define BENCHMARK_NOEXCEPT_OP(x)
|
|
# endif
|
|
# define __func__ __FUNCTION__
|
|
#else
|
|
# define BENCHMARK_UNUSED
|
|
# define BENCHMARK_ALWAYS_INLINE
|
|
# define BENCHMARK_NOEXCEPT
|
|
# define BENCHMARK_NOEXCEPT_OP(x)
|
|
#endif
|
|
|
|
#if defined(__GNUC__)
|
|
# define BENCHMARK_BUILTIN_EXPECT(x, y) __builtin_expect(x, y)
|
|
#else
|
|
# define BENCHMARK_BUILTIN_EXPECT(x, y) x
|
|
#endif
|
|
|
|
#if defined(__GNUC__) && !defined(__clang__)
|
|
#define BENCHMARK_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
|
|
#endif
|
|
|
|
#endif // BENCHMARK_MACROS_H_
|