File: xxhash.cpp

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (29 lines) | stat: -rw-r--r-- 727 bytes parent folder | download | duplicates (7) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 
#include "llvm/Support/xxhash.h"
#include "benchmark/benchmark.h"

#include <memory>

static uint32_t xorshift(uint32_t State) {
  State ^= State << 13;
  State ^= State >> 17;
  State ^= State << 5;
  return State;
}

static void BM_xxh3_64bits(benchmark::State &State) {
  std::unique_ptr<uint32_t[]> Data(new uint32_t[State.range(0) / 4]);

  uint32_t Prev = 0xcafebabe;
  for (int64_t I = 0; I < State.range(0) / 4; I++)
    Data[I] = Prev = xorshift(Prev);

  llvm::ArrayRef DataRef =
      llvm::ArrayRef(reinterpret_cast<uint8_t *>(Data.get()), State.range(0));

  for (auto _ : State)
    llvm::xxh3_64bits(DataRef);
}

BENCHMARK(BM_xxh3_64bits)->Arg(32)->Arg(512)->Arg(64 * 1024)->Arg(1024 * 1024);

BENCHMARK_MAIN();