125201 2013-12-03 16:52:37 -0800 Performance issue (with KineticJS) which goes away when dev console is open 2020-03-31 11:41:31 -0700 1 1 1 Unclassified WebKit Canvas 528+ (Nightly build) Mac (Intel) OS X 10.9 NEW http://jsfiddle.net/LAgBF/27/ InRadar P2 Normal --- 1 piers webkit-unassigned webkit-bug-importer oldest_to_newest 956215 0 piers 2013-12-03 16:52:37 -0800 I've been trying to put together a simple schematic editor using KineticJS (and JSFiddle) which has some fairly severe performance issues when I select 3 objects and try to move them at once. However when I invoke the JS profiler (or any other part of the web inspector it seems), the problems go away. Steps to repeat: Open the above URL Run the code by clicking "run" in the top left In the canvas area at the bottom-right, select the 3 boxes (using shift, no marquee yet) and try to drag them. Beachball ensues for a time. This does not occur if you only select 2 boxes, or if you have any part of the web inspector open. It occurs much less repeatably if you run the code outside JSFiddle (I don't actually have it hosted anywhere). Also, later versions of the same code, e.g. http://jsfiddle.net/LAgBF/31/ (which has partial marquee select) do not always exhibit the problem. 1636155 1 webkit-bug-importer 2020-03-31 11:41:31 -0700 <rdar://problem/61117724>