rspack-perf-profiling

Profile Rspack builds on Linux by using the perf tool with DWARF call graphs to capture detailed kernel and user-space stack traces, generating a perf.data file for precise CPU hotspot analysis.

Perf profiling with DWARF call graphs is used to resolve both kernel and user-space stacks for Rspack builds, enabling developers to identify exact CPU bottlenecks and hotspots during performance optimization and benchmarking.

Yes, you need the Linux operating system and the perf tool to analyze Rspack CPU bottlenecks, as the profiling process relies on Linux perf to record repeatable stack traces.

Yes, you can visualize per-CPU thread hotspots for Rspack profiling by optionally integrating with Samply, which reads the generated perf data to provide per-CPU visualization.

The best way to uncover Rspack performance regressions during benchmarking is to build a profiling-enabled binding, enable kernel symbols, and record a perf profile to capture repeatable CPU hotspot data.

Your Rspack build profiling may not resolve user-space stack traces if DWARF call graphs are not enabled or kernel symbols are not properly configured, both required to accurately capture detailed stack data.