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

map lookup (v2)

Revision 2 of this benchmark created by Igor Minar on August 10, 2014

Setup

var protoCache = {};
  var noProtoCache = Object.create(null);
  
  protoCache.foo = 'bar';
  noProtoCache.foo = 'bar';
  
  var hasOwnProperty = Object.prototype.hasOwnProperty;
  var foo = 'foo';
  var baz = 'baz';

Test runner

Ready to run.

Testing in
Test		Ops/sec
proto hit	`protoCache.foo`	ready
no-proto hit	`noProtoCache.foo`	ready
proto miss	`protoCache.baz`	ready
no-proto miss	`noProtoCache.baz`	ready
proto hasOwn hit	`protoCache.hasOwnProperty(foo)`	ready
no-proto hasOwn hit	`hasOwnProperty.call(noProtoCache, foo)`	ready
proto hasOwn miss	`protoCache.hasOwnProperty(baz)`	ready
no-proto hasOwn miss	`hasOwnProperty.call(noProtoCache, baz)`	ready
proto in miss	`baz in protoCache`	ready
no-proto in miss	`baz in noProtoCache`	ready
proto in hit	`foo in protoCache`	ready
no-proto in hit	`foo in noProtoCache`	ready
proto bracket hit	`protoCache[foo]`	ready
no-proto bracket hit	`noProtoCache[foo]`	ready
proto bracket miss	`protoCache[baz]`	ready
no-proto bracket miss	`noProtoCache[baz]`	ready

Revisions

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

Revision 1: published by Igor Minar on August 8, 2014
Revision 2: published by Igor Minar on August 10, 2014