93b144b7b4
Motivation: HttpMethod#valueOf shows up on profiler results in the top set of results. Since it is a relatively simple operation it can be improved in isolation. Modifications: - Introduce a special case map which assigns each HttpMethod to a unique index in an array and provides constant time lookup from a hash code algorithm. When the bucket is matched we can then directly do equality comparison instead of potentially following a linked structure when HashMap has hash collisions. Result: ~10% improvement in benchmark results for HttpMethod#valueOf Benchmark Mode Cnt Score Error Units HttpMethodMapBenchmark.newMapKnownMethods thrpt 16 31.831 ± 0.928 ops/us HttpMethodMapBenchmark.newMapMixMethods thrpt 16 25.568 ± 0.400 ops/us HttpMethodMapBenchmark.newMapUnknownMethods thrpt 16 51.413 ± 1.824 ops/us HttpMethodMapBenchmark.oldMapKnownMethods thrpt 16 29.226 ± 0.330 ops/us HttpMethodMapBenchmark.oldMapMixMethods thrpt 16 21.073 ± 0.247 ops/us HttpMethodMapBenchmark.oldMapUnknownMethods thrpt 16 49.081 ± 0.577 ops/us |
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