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// Copyright (c) 2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <bench/bench.h>
#include <crypto/chacha20.h>
/* Number of bytes to process per iteration */
static const uint64_t BUFFER_SIZE_TINY = 64;
static const uint64_t BUFFER_SIZE_SMALL = 256;
static const uint64_t BUFFER_SIZE_LARGE = 1024*1024;
static void CHACHA20(benchmark::State& state, size_t buffersize)
{
std::vector<uint8_t> key(32,0);
ChaCha20 ctx(key.data(), key.size());
ctx.SetIV(0);
ctx.Seek(0);
std::vector<uint8_t> in(buffersize,0);
std::vector<uint8_t> out(buffersize,0);
while (state.KeepRunning()) {
ctx.Crypt(in.data(), out.data(), in.size());
}
}
static void CHACHA20_64BYTES(benchmark::State& state)
{
CHACHA20(state, BUFFER_SIZE_TINY);
}
static void CHACHA20_256BYTES(benchmark::State& state)
{
CHACHA20(state, BUFFER_SIZE_SMALL);
}
static void CHACHA20_1MB(benchmark::State& state)
{
CHACHA20(state, BUFFER_SIZE_LARGE);
}
BENCHMARK(CHACHA20_64BYTES, 500000);
BENCHMARK(CHACHA20_256BYTES, 250000);
BENCHMARK(CHACHA20_1MB, 340);
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