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Add benchmarks for json string serialize/deserialize (#12258)

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Co-authored-by: sfan5 <sfan5@live.de>
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paradust7 2022-05-06 13:17:16 -07:00 • committed by GitHub
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src/benchmark/benchmark_serialize.cpp Normal file
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/*
Minetest
Copyright (C) 2022 Minetest Authors
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "benchmark_setup.h"
#include "util/serialize.h"
#include <sstream>
#include <ios>
// Builds a string of exactly `length` characters by repeating `s` (rest cut off)
static std::string makeRepeatTo(const std::string &s, size_t length)
{
std::string v;
v.reserve(length + s.size());
for (size_t i = 0; i < length; i += s.size()) {
v += s;
}
v.resize(length);
return v;
}
#define BENCH3(_label, _chars, _length, _lengthlabel) \
BENCHMARK_ADVANCED("serializeJsonStringIfNeeded_" _lengthlabel "_" _label)(Catch::Benchmark::Chronometer meter) { \
std::string s = makeRepeatTo(_chars, _length); \
meter.measure([&] { return serializeJsonStringIfNeeded(s); }); \
}; \
BENCHMARK_ADVANCED("deSerializeJsonStringIfNeeded_" _lengthlabel "_" _label)(Catch::Benchmark::Chronometer meter) { \
std::string s = makeRepeatTo(_chars, _length); \
std::string serialized = serializeJsonStringIfNeeded(s); \
std::istringstream is(serialized, std::ios::binary); \
meter.measure([&] { \
is.clear(); \
is.seekg(0, std::ios::beg); \
return deSerializeJsonStringIfNeeded(is); \
}); \
};
/* Both with and without a space character (' ') */
#define BENCH2(_label, _chars, _length, _lengthlabel) \
BENCH3(_label, _chars, _length, _lengthlabel) \
BENCH3(_label "_with_space", " " _chars, _length, _lengthlabel) \
/* Iterate over input lengths */
#define BENCH1(_label, _chars) \
BENCH2(_label, _chars, 10, "small") \
BENCH2(_label, _chars, 10000, "large")
/* Iterate over character sets */
#define BENCH_ALL() \
BENCH1("alpha", "abcdefghijklmnopqrstuvwxyz") \
BENCH1("escaped", "\"\\/\b\f\n\r\t") \
BENCH1("nonascii", "\xf0\xff")
TEST_CASE("benchmark_serialize") {
BENCH_ALL()
}