benchmark.js

// Simple one-function benchmark for node.js
// originally from http://mrale.ph/blog/2011/03/30/external-arrays-and-nodejs.html

// Pass n = number of iterations (only affects accuracy of ns/op)
// Pass f = function to call
function benchmark(n, f) {
  var start = process.hrtime();
  for (var i = 0; i < n; i++) f();
  var end = process.hrtime(start);
  
  console.log("took %s ns / op", ((end[0] * 1e9) + end[1]) / n);
}