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/* benchmark_compress.cc -- benchmark compress()
* Copyright (C) 2024-2025 Hans Kristian Rosbach
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include <stdio.h>
#include <assert.h>
#include <benchmark/benchmark.h>
extern "C" {
# include "zbuild.h"
# include "zutil_p.h"
# if defined(ZLIB_COMPAT)
# include "zlib.h"
# else
# include "zlib-ng.h"
# endif
# include "test/compressible_data_p.h"
}
#define MAX_SIZE (64 * 1024)
class compress_bench: public benchmark::Fixture {
private:
uint8_t *inbuff;
uint8_t *outbuff;
public:
void SetUp(::benchmark::State& state) {
outbuff = (uint8_t *)malloc(MAX_SIZE + 16);
if (outbuff == NULL) {
state.SkipWithError("malloc failed");
return;
}
// Initialize input buffer with highly compressible data, interspersed
// with small amounts of random data and 3-byte matches.
inbuff = gen_compressible_data(MAX_SIZE);
if (inbuff == NULL) {
free(outbuff);
outbuff = NULL;
state.SkipWithError("gen_compressible_data() failed");
return;
}
}
void Bench(benchmark::State& state) {
int err = 0;
for (auto _ : state) {
z_uintmax_t compressed_size = MAX_SIZE + 16;
err = PREFIX(compress)(outbuff, &compressed_size, inbuff, (size_t)state.range(0));
if (err != Z_OK) {
fprintf(stderr, "compress() failed with error %d\n", err);
abort();
}
// Prevent the result from being optimized away
benchmark::DoNotOptimize(err);
}
}
void TearDown(const ::benchmark::State&) {
free(inbuff);
free(outbuff);
}
};
#define BENCHMARK_COMPRESS(name) \
BENCHMARK_DEFINE_F(compress_bench, name)(benchmark::State& state) { \
Bench(state); \
} \
BENCHMARK_REGISTER_F(compress_bench, name)->Arg(1)->Arg(16)->Arg(48)->Arg(256)->Arg(1<<10)->Arg(4<<10)->Arg(16<<10)->Arg(64<<10);
BENCHMARK_COMPRESS(compress_bench);
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