V8 --prof

1. Run Chrome or Node.js with --prof flag
   chrome --js-flags='--prof' --no-sandbox 'http://localhost:8080/'
   node --prof script.js
   

2. Install tick processor https://github.com/dex4er/js-tick-processor
   npm install -g tick-processor
   

3. tick-processor isolate-0x123456-v8.log >isolate-0x123456-v8.txt