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[benchmark-map] Remove rand() overhead from benchmark

This commit is contained in:
Behdad Esfahbod 2022-04-29 13:14:41 -06:00
parent 067225a86d
commit 5866ec05f5
1 changed files with 6 additions and 2 deletions
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8
perf/benchmark-map.cc
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@ -29,11 +29,13 @@ static void BM_MapInsert(benchmark::State& state) {
RandomMap(map_size, original);
assert(hb_map_get_population(original) == map_size);
auto needle = map_size / 2;
auto v = 0;
for (auto _ : state) {
// TODO(garretrieger): create a copy of the original map.
// Needs a hb_map_copy(..) in public api.
hb_map_set (original, rand (), rand ());
hb_map_set (original, needle++, v++);
}
hb_map_destroy(original);
@ -49,9 +51,11 @@ static void BM_MapLookup(benchmark::State& state) {
RandomMap(map_size, original);
assert(hb_map_get_population(original) == map_size);
auto needle = map_size / 2;
for (auto _ : state) {
benchmark::DoNotOptimize(
hb_map_get (original, rand()));
hb_map_get (original, needle++));
}
hb_map_destroy(original);