[Bug 74116] Re: Very slow and jerky scroll renders browser useless

[Jimt]

I can confirm this behavior on Ubuntu 8.x with Firefox 3.0b5.
For me, the slow scrolling seems to be limited to websites with a significant amount of CSS layout.

To test this, I have installed the Firefox Web Development Add-on which
offers some tools to test out the CSS in a given page.

With CSS turned on normally, the scrolling is really slow and very jerky.
As soon as I disable all CSS parsing for the page, scrolling immediately improves to the way it should work. Smooth and fast.

Compiz/Xgl does not seem to affect anything, whether I use the lowest
Appearance settings or anything else.  Disabling Pango does not have any
effect either,

The only improvement I get is by disabling CSS altogether.

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Very slow and jerky scroll renders browser useless
https://bugs.launchpad.net/bugs/74116
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