Date.now vs new Date().getTime() vs +new Date (v24)

Revision 24 of this benchmark created on

Preparation HTML

<script>
if (!('now' in Date)) {
 Date.now = function() { return new Date().getTime();}
}
Date.now2 = function() { return +(new Date);}
</script>

Test runner

Ready to run.

Testing in
TestOps/sec
Date.now()
Date.now()
ready
new Date().getTime()
new Date().getTime()
ready
+new Date
+new Date
ready
parentheses 1
(new Date).getTime()
ready
parentheses 2
(new Date()).getTime()
ready
valueof
new Date().valueOf()
ready
+(new Date) shim
Date.now2();
ready
valueof parentheses
(new Date).valueOf()
ready
window.performance.now() || new Date().getTime()
window.performance && window.performance.now ? window.performance.now() : new Date().getTime()
ready
window.performance.now()
window.performance.now()
ready

Revisions

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