So I guess the problem is that setAttribute() is slow?
Josh Matthews <[email protected]> wrote:
>On 05/27/2013 03:45 PM, Josh Matthews wrote:
>> On 05/27/2013 02:25 PM, Josh Matthews wrote:
>>> The following script (test_hammer_layout.html) can now run in Servo,
>so
>>> I've finally been able to begin obtaining baseline performance data.
>>> Note that this is with the exiting Rust scheduler, not Brian's new
>one:
>>>
>>> >var divs = document.getElementsByTagName("div");
>>> >var div = divs[0];
>>> >
>>> >var count = 1000000;
>>> >var start = new Date();
>>> >for (var i = 0; i < count; i++) {
>>> > div.setAttribute('id', 'styled');
>>> > div.getBoundingClientRect();
>>> >}
>>> >var stop = new Date();
>>> >window.alert((stop - start) / count * 1e6);
>>> >window.close();
>>>
>>> This yields 1239493.
>>>
>>> Cheers,
>>> Josh
>>
>> For the sake of contrast, a current Firefox nightly shows me 1319.
>
>And interestingly enough, the same test with the
>div.getBoundingClientRect call removed yields a marginally better
>1162253.
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