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shibing624
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source_code

Dataset card Data Studio Files Community
2
text
stringlengths
0
2.2M
//
// 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.
// ----------------------------- END-OF-FILE ----------------------------------
/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* 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 <thread>
#include <glog/logging.h>
#include <folly/Benchmark.h>
#include <folly/File.h>
#include <folly/gen/Base.h>
#include <folly/gen/File.h>
using namespace folly::gen;
BENCHMARK(ByLine_Pipes, iters) {
std::thread thread;
int rfd = -1;
int wfd;
BENCHMARK_SUSPEND {
int p[2];
CHECK_ERR(::pipe(p));
rfd = p[0];
wfd = p[1];
thread = std::thread([wfd, iters] {
char x = 'x';
PCHECK(::write(wfd, &x, 1) == 1); // signal startup
FILE* f = fdopen(wfd, "w");
PCHECK(f);
for (size_t i = 1; i <= iters; ++i) {
fprintf(f, "%zu\n", i);
}
fclose(f);
});
char buf;
PCHECK(::read(rfd, &buf, 1) == 1); // wait for startup
}
CHECK_ERR(rfd);
auto s = byLine(folly::File(rfd)) | eachTo<int64_t>() | sum;
folly::doNotOptimizeAway(s);
BENCHMARK_SUSPEND {
::close(rfd);
CHECK_EQ(s, int64_t(iters) * (iters + 1) / 2);
thread.join();
}
}
// Results from an Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz
// ============================================================================
// folly/gen/test/FileBenchmark.cpp relative time/iter iters/s
// ============================================================================
// ByLine_Pipes 148.63ns 6.73M
// ============================================================================
int main(int argc, char* argv[]) {
gflags::ParseCommandLineFlags(&argc, &argv, true);
folly::runBenchmarks();
return 0;
}
// bslh_wyhashalgorithm.cpp -*-C++-*-
#include <bslh_wyhashalgorithm.h>
#include <bsls_byteorderutil.h>
#include <bsls_performancehint.h>
#include <bsls_platform.h>
//includes
#include <stdint.h>
#include <string.h>