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Message from discussion HTML 5 Canvas: Linux Performance Issues
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Will Daniels  
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 More options Oct 8 2009, 7:08 pm
Newsgroups: mozilla.dev.performance
From: Will Daniels <daniels.w...@googlemail.com>
Date: Thu, 8 Oct 2009 16:08:19 -0700 (PDT)
Local: Thurs, Oct 8 2009 7:08 pm
Subject: Re: HTML 5 Canvas: Linux Performance Issues
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On Oct 8, 11:03 pm, Boris Zbarsky <bzbar...@mit.edu> wrote:

> On 10/8/09 3:40 PM, Will Daniels wrote:

> > That would be cool, though to be honest I haven't really looked at it
> > properly myself yet, and no doubt you have bigger fish to fry ;) I
> > would be embarrassed if it turned out to be just my lousy javascript
> > knowledge. Though on second thoughts, it does work fine in all other
> > cases...so I don't know...maybe if someone could just confirm for me
> > that it *is* lagged with the standard Mozilla builds for Linux, in
> > case I did something wacky with the install?

> I can certainly confirm that, in my Linux VM.  No lag on the small
> mandelbrot, but quite noticeable lag on the big one.

That _really_ is odd, since the zoom box itself is actually the same
size in both! I wonder if there is some delay then on the getImageData
relative to the size of the source context perhaps? I have to do some
more tests, though I don't think that can happen until the weekend
now...no reason to hurry anyway I guess.

> I believe 64-bit jit will happen in Firefox whatever-is-after-3.6.

Nice :) If there's anything I can do to help there, please let me
know. I'm not at all familiar with the Firefox architecture or code,
but I'm a capable programmer, a fair mathematician and a very fast
learner :P

Perhaps there are some relatively isolated areas of the JIT code that
I could get a sufficient handle on quickly to help with? Otherwise, I
don't mind just doing a bit of testing or something - I'd like to do
my bit to make sure Firefox's Linux performance is as good as it can
be.

Thanks again for your assistance here,
Will


 
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