/*
* Copyright ( C ) 2017 The Android Open Source Project
*
* 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 .
*/
#include <err.h>
#include <langinfo.h>
#include <locale.h>
#include <malloc.h>
#include <stdlib.h>
#include <unistd.h>
#include <benchmark/benchmark.h>
#include "ScopedDecayTimeRestorer.h"
#include "util.h"
static void MallocFree(benchmark::State& state) {
const size_t nbytes = state.range(0 );
int pagesize = getpagesize();
for (auto _ : state) {
void * ptr;
benchmark::DoNotOptimize(ptr = malloc(nbytes));
MakeAllocationResident(ptr, nbytes, pagesize);
free(ptr);
}
state.SetBytesProcessed(uint64_t(state.iterations()) * uint64_t(nbytes));
}
static void BM_stdlib_malloc_free_default(benchmark::State& state) {
#if defined (__BIONIC__)
ScopedDecayTimeRestorer restorer;
// The default is expected to be a zero decay time.
mallopt(M_DECAY_TIME, 0 );
#endif
MallocFree(state);
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_malloc_free_default, "AT_COMMON_SIZES" );
#if defined (__BIONIC__)
static void BM_stdlib_malloc_free_decay1(benchmark::State& state) {
ScopedDecayTimeRestorer restorer;
mallopt(M_DECAY_TIME, 1 );
MallocFree(state);
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_malloc_free_decay1, "AT_COMMON_SIZES" );
#endif
static void CallocFree(benchmark::State& state) {
const size_t nbytes = state.range(0 );
int pagesize = getpagesize();
for (auto _ : state) {
void * ptr;
benchmark::DoNotOptimize(ptr = calloc(1 , nbytes));
MakeAllocationResident(ptr, nbytes, pagesize);
free(ptr);
}
state.SetBytesProcessed(uint64_t(state.iterations()) * uint64_t(nbytes));
}
static void BM_stdlib_calloc_free_default(benchmark::State& state) {
#if defined (__BIONIC__)
ScopedDecayTimeRestorer restorer;
// The default is expected to be a zero decay time.
mallopt(M_DECAY_TIME, 0 );
#endif
CallocFree(state);
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_calloc_free_default, "AT_COMMON_SIZES" );
#if defined (__BIONIC__)
static void BM_stdlib_calloc_free_decay1(benchmark::State& state) {
mallopt(M_DECAY_TIME, 1 );
CallocFree(state);
mallopt(M_DECAY_TIME, 0 );
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_calloc_free_decay1, "AT_COMMON_SIZES" );
#endif
static void MallocMultiple(benchmark::State& state, size_t nbytes, size_t numAllocs) {
int pagesize = getpagesize();
void * ptrs[numAllocs];
for (auto _ : state) {
for (size_t i = 0 ; i < numAllocs; i++) {
benchmark::DoNotOptimize(ptrs[i] = reinterpret_cast <uint8_t*>(malloc(nbytes)));
MakeAllocationResident(ptrs[i], nbytes, pagesize);
}
state.PauseTiming(); // Stop timers while freeing pointers.
for (size_t i = 0 ; i < numAllocs; i++) {
free(ptrs[i]);
}
state.ResumeTiming();
}
state.SetBytesProcessed(uint64_t(state.iterations()) * uint64_t(nbytes) * numAllocs);
}
void BM_stdlib_malloc_forty_default(benchmark::State& state) {
#if defined (__BIONIC__)
ScopedDecayTimeRestorer restorer;
// The default is expected to be a zero decay time.
mallopt(M_DECAY_TIME, 0 );
#endif
MallocMultiple(state, state.range(0 ), 40 );
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_malloc_forty_default, "AT_COMMON_SIZES" );
#if defined (__BIONIC__)
void BM_stdlib_malloc_forty_decay1(benchmark::State& state) {
ScopedDecayTimeRestorer restorer;
mallopt(M_DECAY_TIME, 1 );
MallocMultiple(state, state.range(0 ), 40 );
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_malloc_forty_decay1, "AT_COMMON_SIZES" );
#endif
void BM_stdlib_malloc_multiple_8192_allocs_default(benchmark::State& state) {
#if defined (__BIONIC__)
ScopedDecayTimeRestorer restorer;
// The default is expected to be a zero decay time.
mallopt(M_DECAY_TIME, 0 );
#endif
MallocMultiple(state, 8192 , state.range(0 ));
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_malloc_multiple_8192_allocs_default, "AT_SMALL_SIZES" );
#if defined (__BIONIC__)
void BM_stdlib_malloc_multiple_8192_allocs_decay1(benchmark::State& state) {
ScopedDecayTimeRestorer restorer;
mallopt(M_DECAY_TIME, 1 );
MallocMultiple(state, 8192 , state.range(0 ));
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_malloc_multiple_8192_allocs_decay1, "AT_SMALL_SIZES" );
#endif
static void BM_stdlib_mbstowcs_ascii(benchmark::State& state) {
// It doesn't really matter what ASCII character we pick.
// The flow through the fast path is the same regardless.
const size_t count = 500000 ;
std::vector<char > mbs(count, 'e' );
std::vector<wchar_t > wcs(count);
for (auto _ : state) {
benchmark::DoNotOptimize(mbstowcs(&wcs[0 ], &mbs[0 ], wcs.size()));
}
state.SetBytesProcessed(uint64_t(state.iterations()) * uint64_t(wcs.size()));
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_mbstowcs_ascii, "" );
static void BM_stdlib_mbstowcs_wide(benchmark::State& state) {
// It doesn't matter much what wide character we pick.
// A three-byte character seems pretty representative, and all three byte
// characters are the same from the code's perspective.
const size_t count = 500000 ;
std::string mbs;
for (size_t i = 0 ; i < count; i++) {
mbs += "\xe5\xb1\xb1" ;
}
std::vector<wchar_t > wcs(count);
for (auto _ : state) {
benchmark::DoNotOptimize(mbstowcs(&wcs[0 ], &mbs[0 ], wcs.size()));
}
state.SetBytesProcessed(uint64_t(state.iterations()) * uint64_t(wcs.size()));
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_mbstowcs_wide, "" );
static void BM_stdlib_mbrtowc_1(benchmark::State& state) {
wchar_t wc;
for (auto _ : state) {
benchmark::DoNotOptimize(mbrtowc(&wc, "e" , 1 , nullptr));
}
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_mbrtowc_1, "" );
static void BM_stdlib_mbrtowc_2(benchmark::State& state) {
wchar_t wc;
for (auto _ : state) {
benchmark::DoNotOptimize(mbrtowc(&wc, "\xc3\x9f" , 3 , nullptr));
}
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_mbrtowc_2, "" );
static void BM_stdlib_mbrtowc_3(benchmark::State& state) {
wchar_t wc;
for (auto _ : state) {
benchmark::DoNotOptimize(mbrtowc(&wc, "\xe5\xb1\xb1" , 3 , nullptr));
}
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_mbrtowc_3, "" );
static void BM_stdlib_mbrtowc_4(benchmark::State& state) {
wchar_t wc;
for (auto _ : state) {
benchmark::DoNotOptimize(mbrtowc(&wc, "\xf0\xa4\xad\xa2" , 4 , nullptr));
}
}
BIONIC_BENCHMARK_WITH_ARG(BM_stdlib_mbrtowc_4, "" );
BIONIC_TRIVIAL_BENCHMARK(BM_stdlib_atoi, atoi(" -123" ));
BIONIC_TRIVIAL_BENCHMARK(BM_stdlib_atol, atol(" -123" ));
BIONIC_TRIVIAL_BENCHMARK(BM_stdlib_strtol, strtol(" -123" , nullptr, 0 ));
BIONIC_TRIVIAL_BENCHMARK(BM_stdlib_strtoll, strtoll(" -123" , nullptr, 0 ));
BIONIC_TRIVIAL_BENCHMARK(BM_stdlib_strtoul, strtoul(" -123" , nullptr, 0 ));
BIONIC_TRIVIAL_BENCHMARK(BM_stdlib_strtoull, strtoull(" -123" , nullptr, 0 ));
BIONIC_TRIVIAL_BENCHMARK(BM_stdlib_strtol_hex, strtol("0xdeadbeef" , nullptr, 0 ));
BIONIC_TRIVIAL_BENCHMARK(BM_stdlib_strtoul_hex, strtoul("0xdeadbeef" , nullptr, 0 ));
Messung V0.5 in Prozent C=84 H=96 G=90
¤ Dauer der Verarbeitung: 0.1 Sekunden
(vorverarbeitet am 2026-06-28)
¤
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