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added 2 commits
March 4, 2015 12:35
sync.Pool is after all faster than the home-made free list. Especially under contention. To prove that, this commit also adds a benchmark for concurrent fingerprint calculation. Benchmark results: (Run with -cpu=1,2,4. x-y -> x goroutines with GOMAXPROCS=y.) benchmark old ns/op new ns/op delta BenchmarkMetricToFingerprintTripleConc4-4 320 138 -56.88% BenchmarkMetricToFingerprintTripleConc8-4 314 141 -55.10% BenchmarkMetricToFingerprintTripleConc4-2 344 264 -23.26% BenchmarkMetricToFingerprintTripleConc2-4 331 256 -22.66% BenchmarkMetricToFingerprintTripleConc8-2 338 263 -22.19% BenchmarkMetricToFingerprintTripleConc1-4 599 505 -15.69% BenchmarkMetricToFingerprintTripleConc4 553 493 -10.85% BenchmarkMetricToFingerprintTripleConc2-2 327 292 -10.70% BenchmarkMetricToFingerprintTripleConc8 554 496 -10.47% BenchmarkMetricToFingerprintTripleConc2 555 501 -9.73% BenchmarkMetricToFingerprintTripleConc1 554 509 -8.12% BenchmarkMetricToFingerprintTripleConc1-2 551 513 -6.90%
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sync.Pool is after all faster than the home-made free list. Especially
under contention. To prove that, this commit also adds a benchmark for
concurrent fingerprint calculation.
Benchmark results:
(Run with -cpu=1,2,4. x-y -> x goroutines with GOMAXPROCS=y.)
benchmark old ns/op new ns/op delta
BenchmarkMetricToFingerprintTripleConc4-4 320 138 -56.88%
BenchmarkMetricToFingerprintTripleConc8-4 314 141 -55.10%
BenchmarkMetricToFingerprintTripleConc4-2 344 264 -23.26%
BenchmarkMetricToFingerprintTripleConc2-4 331 256 -22.66%
BenchmarkMetricToFingerprintTripleConc8-2 338 263 -22.19%
BenchmarkMetricToFingerprintTripleConc1-4 599 505 -15.69%
BenchmarkMetricToFingerprintTripleConc4 553 493 -10.85%
BenchmarkMetricToFingerprintTripleConc2-2 327 292 -10.70%
BenchmarkMetricToFingerprintTripleConc8 554 496 -10.47%
BenchmarkMetricToFingerprintTripleConc2 555 501 -9.73%
BenchmarkMetricToFingerprintTripleConc1 554 509 -8.12%
BenchmarkMetricToFingerprintTripleConc1-2 551 513 -6.90%
@juliusv