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by reinitctxoffset
2 hours ago
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On modern super wide znver5 or SBSA with full-clock scalar 256 or 512 ALUs / SIMD lanes deep pipelines hight BTB pressure eyc. it's just really difficult to make a priori statements about performance for a given workload. absl::flat_hash_map (or folly::F14) are great defaults if you can eat the invalidation semantics. But if it's really hot you measure by workload and have infrastructure to flag the right ones in. This seems promising. I'll start benching it alongside the other likely lads. |
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