8 months of performance PRs: dev says 75% of the work is profiling
Abhishekcur · x · 2026-10-24
A developer shared his experience landing performance-optimization PRs in production codebases over 8 months. His method: reproduce locally, get real numbers from profilers (Criterion, Samply, Flamegraph, perf on Debian/X-11), discuss architecture with maintainers, then iterate through reviews. He estimates 75% of his time went to profile-guided optimization, stressing that seeing real profiler numbers before acting matters more than any other learning resource.
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