78574 2012-02-13 22:03:59 -0800 Web Inspector: Typed Arrays not sized correctly in heap snapshots 2016-05-20 09:33:01 -0700 1 1 1 Unclassified WebKit Web Inspector (Deprecated) 528+ (Nightly build) All All RESOLVED INVALID https://bugs.webkit.org/show_bug.cgi?id=157945 P2 Major --- 0 ben.vanik webkit-unassigned alph apavlov bburg ben.vanik bweinstein joepeck kbr keishi loislo michaelbraithwaite pfeldman pmuellr rik yurys oldest_to_newest 555946 0 ben.vanik 2012-02-13 22:03:59 -0800 While trying to find the discrepancies between Task Manager and the heap snapshot panel in the Chrome dev tools I noticed that typed arrays are not getting their size counted correctly. It looks like only the Javascript side of the arrays are counted, and not the native backing store. This means that if one has a 1MB Float32Array they'll only see it as ~32B in the heap profile. In applications making heavy use of typed arrays this makes the heap profiles largely useless for identifying memory hogging code. It's not enough of a workaround to use the count of typed arrays as an indicator of size as a large application will use thousands of arrays varying from 32B to several MB each. 652244 1 michaelbraithwaite 2012-06-19 02:13:38 -0700 See also http://code.google.com/p/chromium/issues/detail?id=129729 659531 2 michaelbraithwaite 2012-06-28 08:53:18 -0700 https://bugs.webkit.org/show_bug.cgi?id=61792 is a superset of this.