Tuesday, February 8, 2011

Timing the EcmaScript 5 Date.now() function

While looking at this awesome list of browser support for EcmaScript 5 features. I decided to time the difference between using Date.now(), a static method to access the current timestamp, and new Date().getTime(), the previous way to get a current timestamp in JavasScript.

The results are this: As expected, the static method wins!

The testing code can be found here:
http://jsbin.com/eheyi3/2 (I have no idea how long this will stay up):

Or here:
http://jamund.com/tests/date.html

Here are the results running in Chrome 9:

Testing Date.now() 10000000 times
0.908s
Testing new Date().getTime() 10000000 times
1.241s

Here are the results running in FireFox 3.6:

Testing Date.now() 10000000 times
7.144s
Testing new Date().getTime() 10000000 times
12.016s


Here are the reuslts running in FireFox 4:

Testing Date.now() 10000000 times
1.73s
Testing new Date().getTime() 10000000 times
3.677s

Here are the results running in Safari 5:

Testing 'Date.now()' 10,000,000 times
0.74s
Testing 'new Date().getTime()' 10,000,000 times
2.817s

1 comment:

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