Quick performance test on JavaScript console (Example)

Quickly test performance of a function on the console (in the browser) with: var i = performance.now(); yourFunction(); performance.now()-i; Or make a helper function, like this: function performanceTest(testFunction, iterations){ var sum = 0; var start = performance.now(); for(var i = 0; i<iterations;i++){ testFunction(); } var time=performance.now()-start; return time; } And use it like this: pe