[FIX]Re: BrowserCommentTextMorph Re: 3.9 browser speed
karl.ramberg at chello.se
Sun Nov 5 21:21:58 UTC 2006
> karl skrev:
>> Andreas Raab skrev:
>>> Pavel Krivanek wrote:
>>>> the reason will be in the gradient background of windows. The
>>>> background is processed during every update now but the previous
>>>> versions were more optimized.
>>> Good theory, but I don't think this is the problem. When I turn off
>>> both TTFs and gradients in 3.9 I still get something like here:
>>> Run 1: 811 msecs
>>> Run 2: 1191 msecs
>>> Run 3: 1483 msecs
>>> Run 4: 1867 msecs
>>> It's a little better but not significantly (and it still feels way
>>> too slow). BTW, if anyone wants to repeat the experiments, the
>>> changes that I did for this test were:
>>> * setting the window title font to a non-TTF (Accuny 14 in my case)
>>> * change SystemWindow>>gradientWithColor: to return just the color
>>> So I'm still at a loss what has changed to introduce that slowdown.
>>> Hm ... let me try something. Oh, yes, now *that* would explain it.
>>> Turn on #debugShowDamage in 3.9 and watch how it redraws the entire
>>> screen almost every time you click anywhere in a browser. Ouch. No
>>> idea why that is but it sure explains the effect.
>> Commenting out some code in BrowserCommentTextMorph reduces the
>> bogus invalidation, so we have to debug the class
>> BrowserCommentTextMorph to see what make it behave so bad.
> I tracked the issue down to SystemWindows>>addPaneSplitters which
> removes and adds pane splitters when the comment pane is added to the
> bottom of the browser.
> I'm not sure how to fix the issue, maybe hiding and showing the pane
> is better than deleting and reinstalling it.
> The root cause of the problem seem to be
> Morph>>privateAddMorph:atIndex: which do a lot of invaliditation that
> cause a massive redraw when it's sent.
BorderedMorph wanted more specific position of the morphs added,
otherwise they would be added to the top left corner. Hope this cures it :-)
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