Files
scylladb/tests/perf/perf_hash.cc
Jesse Haber-Kucharsky fb0866ca20 Move thread_local declarations out of main.cc
Since `disk-error-handler.hh` defines these global variables `extern`,
it makes sense to declare them in the `disk-error-handler.cc` instead of
`main.cc`.

This means that test files don't have to declare them.

Fixes #2735.

Signed-off-by: Jesse Haber-Kucharsky <jhaberku@scylladb.com>
Message-Id: <1eed120bfd9bb3647e03fe05b60c871de2df2a86.1511810004.git.jhaberku@scylladb.com>
2017-11-27 20:27:42 +01:00

53 lines
1.4 KiB
C++

/*
* Copyright (C) 2015 ScyllaDB
*/
/*
* This file is part of Scylla.
*
* Scylla is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Scylla is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
*/
#include "utils/murmur_hash.hh"
#include "tests/perf/perf.hh"
volatile uint64_t black_hole;
int main(int argc, char* argv[]) {
const uint64_t seed = 0;
auto src = bytes("0123412308129301923019283056789012345");
uint64_t sink = 0;
std::cout << "Timing fixed hash...\n";
time_it([&] {
std::array<uint64_t,2> dst;
utils::murmur_hash::hash3_x64_128(src, seed, dst);
sink += dst[0];
sink += dst[1];
});
std::cout << "Timing iterator hash...\n";
time_it([&] {
std::array<uint64_t,2> dst;
utils::murmur_hash::hash3_x64_128(src.begin(), src.size(), seed, dst);
sink += dst[0];
sink += dst[1];
});
black_hole = sink;
}