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68 lines
1.5 KiB
68 lines
1.5 KiB
/* |
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* Benchmarks for hb_map_t operations. |
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*/ |
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#include "benchmark/benchmark.h" |
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#include <cassert> |
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#include <cstdlib> |
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#include "hb.h" |
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void RandomMap(unsigned size, hb_map_t* out) { |
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hb_map_clear(out); |
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srand(size); |
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for (unsigned i = 0; i < size; i++) { |
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while (true) { |
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hb_codepoint_t next = rand(); |
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if (hb_map_has (out, next)) continue; |
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hb_map_set (out, next, rand ()); |
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break; |
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} |
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} |
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} |
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/* Insert a single value into map of varying sizes. */ |
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static void BM_MapInsert(benchmark::State& state) { |
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unsigned map_size = state.range(0); |
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hb_map_t* original = hb_map_create (); |
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RandomMap(map_size, original); |
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assert(hb_map_get_population(original) == map_size); |
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auto needle = map_size / 2; |
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auto v = 0; |
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for (auto _ : state) { |
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// TODO(garretrieger): create a copy of the original map. |
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// Needs a hb_map_copy(..) in public api. |
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hb_map_set (original, needle++, v++); |
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} |
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hb_map_destroy(original); |
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} |
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BENCHMARK(BM_MapInsert) |
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->Range(1 << 4, 1 << 20); |
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/* Single value lookup on map of various sizes. */ |
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static void BM_MapLookup(benchmark::State& state) { |
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unsigned map_size = state.range(0); |
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hb_map_t* original = hb_map_create (); |
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RandomMap(map_size, original); |
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assert(hb_map_get_population(original) == map_size); |
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auto needle = map_size / 2; |
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for (auto _ : state) { |
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benchmark::DoNotOptimize( |
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hb_map_get (original, needle++)); |
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} |
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hb_map_destroy(original); |
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} |
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BENCHMARK(BM_MapLookup) |
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->Range(1 << 4, 1 << 20); // Map size |
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BENCHMARK_MAIN();
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