Poor html5 rendering found in FF8, 9, 10b

[Ilpo Tammi]

Hello,

Just noticed something that might be of interest for you Firefox
developers.
I was comparing the performance of several different browsers in these
new MS "IE10" test demos:
http://ie.microsoft.com/testdrive/
Don't know whether there is a problem in my computer (Lenovo T60
running Win7 32bit) or the Firefox engine, but especially in html5
rendering Firefox (8,9, 10b) lags notably in comparison to Chrome
(16...) and even IE9. For example Chrome commonly gives around
50-60FPS outputs whereas FF commonly stays below 10FPS in several of
these demo thingamabobs.

Do you have pre-existing knowledge on such issues or maybe this is
something you would like to look into? I myself unfortunately lack the
competence for such..

[John Bird]

I can confirm that with Nightly - I did a test watching Sysinternals Process
Explorer and the GPU workload. Some of the demos are similar, eg the
Flying Images, although it looks like Firefox is using somewhat less GPU
than Chrome or IE9, some demos - eg Let it Snow, are extremely slow in FF
and seem to use next to no GPU. And the music doesn't play.

Is this a case of MS choosing tests to make other browsers look bad or is
Firefox using a less of the graphics hardware? Windows 7 here.

John Bird

[Boris Zbarsky]

On 1/26/12 10:10 PM, John Bird wrote:
> Is this a case of MS choosing tests to make other browsers look bad or
> is Firefox using a less of the graphics hardware? Windows 7 here.

Both.

There are some things we don't accelerate yet that IE accelerates, and
almost certainly some things we accelerate that they don't. But their
tests only test things they accelerate, of course.

-Boris