Measure, profile, and compare Go benchmark performance with benchstat.
npx skills add https://github.com/hellopoisonx/aim --skill golang-benchmark-hellopoisonx
Please help me install this Agent Skill. Skill: golang-benchmark Source: https://github.com/hellopoisonx/aim/tree/main/skills/golang-benchmark Command: npx skills add https://github.com/hellopoisonx/aim --skill golang-benchmark-hellopoisonx
It prevents misleading optimization decisions by teaching how to benchmark, profile, and compare Go performance results with enough rigor to distinguish signal from noise.
Tell the assistant: "Write benchmarks for my Go function, run them with -benchmem and -count=10, produce CPU/heap profiles for any hot spots, and compare before/after results with benchstat, explaining any cases where '~' indicates the change is not statistically significant."
High-intent search queries and answers about installing and using this skill.
To write Go benchmarks that prevent dead-code elimination, use b.Loop() for Go 1.24+ and structure setup so results reflect the measured work. This approach avoids misleading optimization decisions.
The best way to compare Go benchmark results statistically is using benchstat. Interpret p-values, confidence intervals, and '~' markers to decide whether performance changes across code revisions are real or just noise.
To capture CPU and heap profiles during Go benchmark execution, run benchmarks with controlled flags like -benchmem and multiple iterations. Generate pprof profile types and execution traces to pinpoint where time and allocations originate.
Yes, you can detect performance regressions in CI using Go benchmarks. Gate performance changes using tools like benchdiff, cob, or gobenchdata with benchstat-backed comparisons, emphasizing robustness under noisy CI conditions.
Benchstat shows a '~' when comparing Go benchmark runs to indicate that the performance change is not statistically significant. This means the observed difference falls within confidence intervals and likely represents noise rather than a real improvement.
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