Command line tool that runs node with the profiling flags needed to use http://mrale.ph/irhydra/2/. Credit to @andreasmadsen for originally helping me with the profiling flags.
npm install -g node-irhydra
node-irhydra some-benchmark.js
Produces two files hydrogen.cfg and code.asm.
Goto http://mrale.ph/irhydra/2/ and load those two files to display which parts of your code were deoptimized and which parts were optimized.
Protip: You can simply click the "refresh" icon on IRHydra if you re-run your benchmark.
MIT