13432 2007-04-21 03:56:29 -0700 determineSpacingForFlowBoxes is O(n^2) 2007-04-21 15:50:44 -0700 1 1 1 Unclassified WebKit Layout and Rendering 523.x (Safari 3) Mac OS X 10.4 RESOLVED FIXED P2 Normal --- 13351 1 hyatt hyatt mitz oldest_to_newest 13617 0 hyatt 2007-04-21 03:56:29 -0700 determineSpacingForFlowBoxes does a bunch of work to try to figure out if the left/right edges should be included for a given inline's line box. If the inline has no borders, no margins and no padding, then this work is unnecessary and can just be avoided completely. 13600 1 14121 hyatt 2007-04-21 05:18:34 -0700 Created attachment 14121 Avoid edge testing if there's no need. 13522 2 14121 mitz 2007-04-21 05:34:16 -0700 Comment on attachment 14121 Avoid edge testing if there's no need. + int marginBorderPadding = marginBorderPaddingLeft() + marginBorderPaddingRight(); These guys will always return 0 since includeLeftEdge and includeRightEdge are false when you call them. 13512 3 mitz 2007-04-21 05:38:21 -0700 Also, their actual values can add up to 0 even if they're not both 0, so I think it's best to check each side separately. 13501 4 mitz 2007-04-21 05:40:03 -0700 (In reply to comment #2) > These guys will always return 0 since includeLeftEdge and includeRightEdge are > false when you call them. > Bah, I overlooked the setEdges() calls before and after. 13502 5 14121 mitz 2007-04-21 05:59:56 -0700 Comment on attachment 14121 Avoid edge testing if there's no need. Actually, even testing each side separately isn't enough. It will fix <span style="border-left: 5px solid; margin-right: -5px;">foo</span> which is the example I had in mind for comment #3, but not <span style="border-left: 5px solid; margin-left: -5px;">foo</span> I think the setEdges(false, false) is unnecessary. 13354 6 hyatt 2007-04-21 14:23:03 -0700 Yeah, good point. I forgot about negative margins. 13355 7 hyatt 2007-04-21 14:23:30 -0700 I think I may explore just making the edge determination faster rather than trying to turn it off completely. 13359 8 hyatt 2007-04-21 14:41:54 -0700 A better fix here is to add bits to line boxes that indicate whether nextOnLineExists and prevOnLineExists. The O(n^2) behavior arises from a lack of caching, since the methods go back up to parents over and over and over again. This should allow edge computations to still be performed but still be efficient. 13360 9 14126 hyatt 2007-04-21 14:54:54 -0700 Created attachment 14126 Add a cache for nextOnLine/prevOnLine existence This patch is much better, since it will be fast even when spans do use borders, margins and padding, etc. 13361 10 14126 aroben 2007-04-21 14:59:35 -0700 Comment on attachment 14126 Add a cache for nextOnLine/prevOnLine existence r=me 13362 11 aroben 2007-04-21 15:00:29 -0700 For future reference, Hyatt has assured me that InlineBoxes are destroyed whenever these cached values would change, so we don't need to worry about recalculating them after the first time. 13363 12 14126 hyatt 2007-04-21 15:31:24 -0700 Comment on attachment 14126 Add a cache for nextOnLine/prevOnLine existence Fails some layout tests. Investigating. 13364 13 14126 hyatt 2007-04-21 15:41:16 -0700 Comment on attachment 14126 Add a cache for nextOnLine/prevOnLine existence AH, no big deal. Just didn't patch the other InlineBox constructor. 13366 14 hyatt 2007-04-21 15:50:44 -0700 Fixed. 14121 2007-04-21 05:18:34 -0700 2007-04-21 14:54:54 -0700 Avoid edge testing if there's no need. patch.txt text/plain 4874 hyatt SW5kZXg6IENoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBDaGFuZ2VMb2cJKHJldmlzaW9uIDIwOTk3 KQorKysgQ2hhbmdlTG9nCSh3b3JraW5nIGNvcHkpCkBAIC0xLDMgKzEsMjQgQEAKKzIwMDctMDQt MjEgIERhdmlkIEh5YXR0ICA8aHlhdHRAYXBwbGUuY29tPgorCisgICAgICAgIEZpeCBmb3IgMTM0 MzIuICBEb24ndCB3YXN0ZSB0aW1lIHNldHRpbmcgdXAgZWRnZSBpbmZvcm1hdGlvbiBpZgorICAg ICAgICB3ZSBkb24ndCBoYXZlIGFueSByZWFzb24gdG8gKGUuZy4sIG5vIGJvcmRlcnMsIG1hcmdp bnMsIHBhZGRpbmcsCisgICAgICAgIGJvcmRlci1yYWRpdXMgb3IgYm94LXNoYWRvdykuCisKKyAg ICAgICAgUmV2aWV3ZWQgYnkgTk9CT0RZIChPT1BTISkuCisKKyAgICAgICAgKiBDaGFuZ2VMb2c6 CisgICAgICAgICogcmVuZGVyaW5nL0lubGluZUZsb3dCb3guY3BwOgorICAgICAgICAoV2ViQ29y ZTo6SW5saW5lRmxvd0JveDo6ZGV0ZXJtaW5lU3BhY2luZ0ZvckZsb3dCb3hlcyk6CisKKzIwMDct 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