fix: benchmarks timeout

[not-matthias]

• fix(go-runner): limit maximum b.Loop() execution time
• refactor(go-runner): move shared logic to external file
• fix(go-runner): limit maximum b.N benchmark time

Sets a maximum time for the benchmark execution, and exits early if we exceed it. Currently this is set to 3 * benchTime (so 9s in our case)

[Copilot]

Pull request overview

This PR addresses performance issues with CodSpeed's Go benchmark runner by implementing safeguards to prevent benchmarks from running excessively long. The changes add timeout limits for both b.Loop() and b.N benchmark execution patterns.

Changes:

• Added maximum execution time limits (2x the benchmark time) to prevent runaway benchmarks
• Refactored duplicate warmup logic into a shared runBenchmarkWithWarmup function
• Modified b.Loop() to track overhead from timer start/stop operations

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
go-runner/overlay/codspeed.go	Adds BenchMaxTimeMult constant, stopOrScaleBLoopCodspeed() method for loop time limiting, and runBenchmarkWithWarmup() function containing shared benchmark execution logic
go-runner/overlay/benchmark1.25.0.go	Refactors inline warmup code to use shared runBenchmarkWithWarmup() function, initializes loopStartTime, and switches to stopOrScaleBLoopCodspeed()
go-runner/overlay/benchmark1.24.0.go	Identical changes to benchmark1.25.0.go for Go 1.24.0 compatibility

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[codspeed-hq]

CodSpeed Performance Report

Merging this PR will not alter performance

_{Comparing cod-2004-codspeed-go-bloop-benchmarks-are-too-slow (6940d07) with main (59c0bda)}

Summary

✅ 48 untouched benchmarks
⏩ 1 skipped benchmark¹

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

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