Build Profiling

WARNING

This feature is planned but not yet implemented.

Concept

Build profiling captures per-process timing data during a build:

This data is rendered as a visual timeline (Gantt-chart style) in a browser, allowing developers to diagnose build performance issues.

Identify serialization bottlenecks -- Find stages where the build runs single-threaded despite available parallelism.
Measure actual vs. theoretical parallelism -- Compare the observed concurrency level against the number of available cores.
Find slow compilation units -- Pinpoint individual source files that take disproportionately long to compile.
Debug build system configuration -- Detect misconfigured dependencies, unnecessary serialization, or suboptimal job scheduling.