llvm-capstone/libcxx/benchmarks/util_smartptr.bench.cpp
Chandler Carruth 57b08b0944 Update more file headers across all of the LLVM projects in the monorepo
to reflect the new license. These used slightly different spellings that
defeated my regular expressions.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351648
2019-01-19 10:56:40 +00:00

42 lines
1.2 KiB
C++

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include <memory>
#include "benchmark/benchmark.h"
static void BM_SharedPtrCreateDestroy(benchmark::State& st) {
while (st.KeepRunning()) {
auto sp = std::make_shared<int>(42);
benchmark::DoNotOptimize(sp.get());
}
}
BENCHMARK(BM_SharedPtrCreateDestroy);
static void BM_SharedPtrIncDecRef(benchmark::State& st) {
auto sp = std::make_shared<int>(42);
benchmark::DoNotOptimize(sp.get());
while (st.KeepRunning()) {
std::shared_ptr<int> sp2(sp);
benchmark::ClobberMemory();
}
}
BENCHMARK(BM_SharedPtrIncDecRef);
static void BM_WeakPtrIncDecRef(benchmark::State& st) {
auto sp = std::make_shared<int>(42);
benchmark::DoNotOptimize(sp.get());
while (st.KeepRunning()) {
std::weak_ptr<int> wp(sp);
benchmark::ClobberMemory();
}
}
BENCHMARK(BM_WeakPtrIncDecRef);
BENCHMARK_MAIN();