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Mircea Trofin 1ee32055ea Reland "[benchmarks] Move libcxx's fork of google/benchmark and llvm/utils'""

This reverts commit e7568b68da and relands
c6f7b720ec.

The culprit was: missed that libc also had a dependency on one of the
copies of `google-benchmark`

Also opportunistically fixed indentation from prev. change.

Differential Revision: https://reviews.llvm.org/D112012

2021-11-16 10:33:31 -08:00

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Random Interleaving

Random Interleaving is a technique to lower run-to-run variance. It randomly interleaves repetitions of a microbenchmark with repetitions from other microbenchmarks in the same benchmark test. Data shows it is able to lower run-to-run variance by 40% on average.

To use, you mainly need to set --benchmark_enable_random_interleaving=true, and optionally specify non-zero repetition count --benchmark_repetitions=9 and optionally decrease the per-repetition time --benchmark_min_time=0.1.

647 B Raw Blame History

Random Interleaving

647 B

Raw Blame History