UPSTREAM PR #1996: Add flat_hash_map benchmarks#9
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Adds benchmark suite for absl::flat_hash_map, the recommended default hash map that previously had no public benchmarks. Benchmarks included: - Basic operations (insert, lookup hit/miss) for int and string keys - Load factor analysis at 25%, 50%, 75%, and 87% capacity - Iteration performance at different load factors - Reserve vs no-reserve comparison across multiple sizes Key findings from benchmark results: - reserve() provides 20-24% performance improvement for known sizes - Load factor has minimal impact on lookup speed (~2.1-2.2M ops/sec) - Higher load factors improve iteration by 30% (better cache locality) - Failed lookups are 50% faster than successful lookups Testing: All benchmarks compile and run successfully with Bazel.
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Source pull request: abseil/abseil-cpp#1996
Adds benchmark suite for absl::flat_hash_map, the recommended default hash map that previously had no public benchmarks.
Benchmarks included:
Key findings from benchmark results:
Testing: All benchmarks compile and run successfully with Bazel.