1. Install jsvu. I use V8 for debug but you can use whatever engine you need. Check documentation for more info.

2. If you on Mac then install gnu-time utility: brew install gnu-time. If you on Linux then go to v8.sh and replace gtime with /usr/bin/time

Run sh v8/bc.sh file.js to execute file.js with V8 engine using flags listed in v8/bc.sh. This will generate a bytecode for each function that prefixed with bc__*. Natives syntax allowed. check bc.sh for more exec modes.

Run sh v8/mc.sh file.js to execute file.js with V8 engine using flags listed in v8/mc.sh. This will generate an optimized machine code for each function that prefixed with bc__* and if they were optimized either manually or my optimization compiler. Natives syntax allowed.