Use Date.now() rather than new Date().getTime().

Use Date.now() rather than new Date().getTime().

Because Date.now() is faster.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=203502

[eroman, 2013-05-31 19:55:07]

This shouldn't really affect overall performance, but I figured I may as well
update it.

Came across it as a performance recommendation on another site.

Based on this benchmark, Date.now() is 50% faster than the alternative:

http://jsperf.com/date-now-vs-new-date-gettime/2

[mmenke1, 2013-05-31 20:00:16]

On 2013/05/31 19:55:07, eroman wrote:
> This shouldn't really affect overall performance, but I figured I may as well
> update it.
> 
> Came across it as a performance recommendation on another site.
> 
> Based on this benchmark, Date.now() is 50% faster than the alternative:
> 
> http://jsperf.com/date-now-vs-new-date-gettime/2

LGTM.  More than just saving time, it saves us 12 bytes!  We should add a new 12
byte comment to celebrate that!

How about "// MagicPony"?  (Without leading spaces, or trailing line break, of
course.

[commit-bot: I haz the power, 2013-05-31 20:07:04]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/eroman@chromium.org/16228003/1

[commit-bot: I haz the power, 2013-05-31 22:43:50]

Change committed as 203502