call-trace

call-trace.js is a JavaScript instrumentation tool that records the complete call graph and optional timing data of a JavaScript file's execution. It converts the trace into Chrome CPU profile format, enabling detailed performance analysis in DevTools without sampling.

Key Features

• Complete Call Graph Recording — Captures every function call and exit, providing a non-sampled execution trace.
• Optional Timing Data — Records timestamps for each function entry and exit when the --time flag is used.
• Chrome DevTools Integration — Exports traces in .cpuprofile format for visualization and analysis in Chrome's performance tools.
• Global Trace Access — Stores trace data in a global variable (_$wɔk) with properties for functions, call records, and timestamps.

Philosophy

It aims to provide precise, non-sampled insights into JavaScript execution for debugging and performance optimization, though it is experimental and may not handle all code patterns reliably.