- From: L. David Baron <dbaron@dbaron.org>
- Date: Thu, 20 Dec 2012 14:59:06 -0500
- To: Boris Zbarsky <bzbarsky@MIT.EDU>
- Cc: www-style@w3.org
On Thursday 2012-12-20 11:51 -0800, Boris Zbarsky wrote: > On 12/20/12 11:46 AM, Simon Fraser wrote: > >Not necessarily. WebKit has a "layout positioned objects only" optimization that attempts to make moving out-of-flow positioned elements fast. > > More precisely, WebKit has a spec violation that attempts to make it > fast. See http://dbaron.org/css/test/2003/abs-pos-intrinsic3 for a > testcase WebKit fails as a result. There should be no horizontal > scrollbar on that page. That said, there are many cases that *can* be optimized; just not all cases. Gecko has a similar optimization, but it's actually currently erring on the side of not optimizing as many cases as I'd like it to. -David -- 𝄞 L. David Baron http://dbaron.org/ 𝄂 𝄢 Mozilla http://www.mozilla.org/ 𝄂
Received on Thursday, 20 December 2012 19:59:37 UTC