merge-cpuprofiles

Merge V8 .cpuprofile files

Collect CPU profiles, either manually or automatically via console.profile() .. console.profileEnd()
Save profiles into in directory
Merge profiles into single file
Load merged profile from out directory back into the Developer Tools

Documentation

Chrome DevTools Protocol Viewer: https://chromedevtools.github.io/devtools-protocol/1-2/Profiler#type-Profile
Protocol sources: https://chromium.googlesource.com/v8/v8/+/master/src/inspector/js_protocol.json#1421