30 lines · cpp
1#include "llvm/Support/xxhash.h"2#include "benchmark/benchmark.h"3 4#include <memory>5 6static uint32_t xorshift(uint32_t State) {7 State ^= State << 13;8 State ^= State >> 17;9 State ^= State << 5;10 return State;11}12 13static void BM_xxh3_64bits(benchmark::State &State) {14 std::unique_ptr<uint32_t[]> Data(new uint32_t[State.range(0) / 4]);15 16 uint32_t Prev = 0xcafebabe;17 for (int64_t I = 0; I < State.range(0) / 4; I++)18 Data[I] = Prev = xorshift(Prev);19 20 llvm::ArrayRef DataRef =21 llvm::ArrayRef(reinterpret_cast<uint8_t *>(Data.get()), State.range(0));22 23 for (auto _ : State)24 llvm::xxh3_64bits(DataRef);25}26 27BENCHMARK(BM_xxh3_64bits)->Arg(32)->Arg(512)->Arg(64 * 1024)->Arg(1024 * 1024);28 29BENCHMARK_MAIN();30