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| -rw-r--r-- | src/doc/guide-testing.md | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/doc/guide-testing.md b/src/doc/guide-testing.md index 682c89fcc53..60ce71dac84 100644 --- a/src/doc/guide-testing.md +++ b/src/doc/guide-testing.md @@ -503,6 +503,8 @@ Advice on writing benchmarks: * Make the code in the `iter` loop do something simple, to assist in pinpointing performance improvements (or regressions) +## Gotcha: optimizations + There's another tricky part to writing benchmarks: benchmarks compiled with optimizations activated can be dramatically changed by the optimizer so that the benchmark is no longer benchmarking what one expects. For example, the |