Status: New
Owner: ----
New issue 2904 by [email protected]: Mix of integer and long strings
as property names severely degrades object iteration
http://code.google.com/p/v8/issues/detail?id=2904
Detailed description of the issue.
Chrome Version : 29.0.1547.76 & 31.0.1636.2 (Official Build 224128)
canary Aura
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
URLs (if applicable) : http://jsperf.com/object-recursion
Other browsers tested:
Add OK or FAIL after other browsers where you have tested this issue:
Safari 5: OK
Firefox 23.0: OK
IE 9: OK
Opera 15: FAIL
What steps will reproduce the problem?
1. See the jsperf code
What is the expected result?
I expect the performance to be no different whatever the different property
names in an object.
What happens instead?
Chrome (and Opera) iterate over objects with a mix of integer and long
string named properties at 10% (at best) of the speed of iterating over an
object with just string or integer-indexed properties
Please provide any additional information below. Attach a screenshot if
possible.
http://jsperf.com/object-recursion
(badly named jsperf), shows the situation in a SCSSE.
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