v8-profiler

node bindings for the v8 profiler

v8-profiler provides node bindings for the v8 profiler and integration with node-inspector

npm install v8-profiler
var profiler = require('v8-profiler');
var snapshot = profiler.takeSnapshot([name])      //takes a heap snapshot

profiler.startProfiling([name])                   //begin cpu profiling
var cpuProfile = profiler.stopProfiling([name])   //finish cpu profiling

Cpu profiles can be viewed and heap snapshots may be taken and viewed from the profiles panel.