jsPerf.app is an online JavaScript performance benchmark test runner & jsperf.com mirror. It is a complete rewrite in homage to the once excellent jsperf.com now with hopefully a more modern & maintainable codebase.

jsperf.com URLs are mirrored at the same path, e.g:

https://jsperf.com/negative-modulo/2

Can be accessed at:

https://jsperf.app/negative-modulo/2

cache function name

Benchmark created by urbeller on October 23, 2014

Test runner

Ready to run.

Test Ops/sec

Direct call

Testing in
Test	Ops/sec
Direct call	`function fn() { var aa = Array.prototype.slice.call(arguments); }`	ready
Cache function pointer	`function fn() { var unboundSlice = Array.prototype.slice; var slice = Function.prototype.call.bind(unboundSlice); slice(arguments); }`	ready

function fn() {
  var aa = Array.prototype.slice.call(arguments);

}

ready

Cache function pointer

function fn() {
  var unboundSlice = Array.prototype.slice;
  var slice = Function.prototype.call.bind(unboundSlice);

  slice(arguments);
}

ready

Revisions

You can edit these tests or add more tests to this page by appending /edit to the URL.

Revision 1: published by urbeller on October 23, 2014