156506 2016-04-12 11:12:25 -0700 Scrolling on Github code viewer is not smooth 2016-05-18 12:10:48 -0700 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 157631 InRadar P2 Normal --- 1 rniwa webkit-unassigned hyatt jonlee sabouhallawa simon.fraser thorton webkit-bug-importer zalan oldest_to_newest 1183120 0 rniwa 2016-04-12 11:12:25 -0700 Visit https://github.com/WebKit/webkit/blob/master/Source/WebCore/dom/Document.cpp on Safari Technology Preview and scroll on the first generation 15" Retina MBP. It feels very slow and shows a lot of flash tiles. 1183122 1 rniwa 2016-04-12 11:12:39 -0700 white* tiles. 1183128 2 simon.fraser 2016-04-12 11:24:20 -0700 Lots of time clipping under paintOutlineForFragments. 1183129 3 webkit-bug-importer 2016-04-12 11:24:42 -0700 <rdar://problem/25684695> 1183130 4 rniwa 2016-04-12 11:25:08 -0700 I wonder if the Github page is also mutating the DOM as we scroll? 1183155 5 simon.fraser 2016-04-12 11:49:28 -0700 This is similar to bug 155728. 1183288 6 zalan 2016-04-12 16:28:37 -0700 Each (source)line on that page is a <tr> with 2 <td>s in it. I bet it's slow because of some table inefficiency. 1194353 7 hyatt 2016-05-18 12:06:04 -0700 This was fixed by the 157631 fix. 1194359 8 jonlee 2016-05-18 12:10:48 -0700 *** This bug has been marked as a duplicate of bug 157631 ***