76045 2012-01-11 02:48:43 -0800 Web Inspector: [Chromium] Heap profiler need to track active DOM objects 2013-04-05 13:01:08 -0700 1 1 1 Unclassified WebKit Web Inspector (Deprecated) 528+ (Nightly build) All All RESOLVED WONTFIX P2 Normal --- 78411 0 mnaganov webkit-unassigned apavlov ap bweinstein jochen joepeck keishi loislo pfeldman pmuellr rik yurys oldest_to_newest 533774 0 mnaganov 2012-01-11 02:48:43 -0800 Active DOM objects are objects that have an internal state (e.g. XMLHttpRequest) and depending on the state may resist to be garbage-collected, even in case when they are not referenced. This way, Js leaks can occur, if such an object holds other objects. See this report by Jochen Eisinger for details: https://docs.google.com/a/google.com/document/d/1Pd7hcFAUs_sFmpGumEkBonELlyU6diJAO9VXE0u6l7o/edit 534052 1 jochen 2012-01-11 11:26:31 -0800 I filed issue 75859 for the actual issue I found: an ActiveDOMObject overrides hasPendingActivity() and essentially always returns true. That integration with the V8 garbage collector marks such objects as referenced, but the reference is not visible to the developer from devtools (in that specific case, you can still detect the presence of the object from js, e.g. if you start a version change transaction it would block even though there's seemingly no database around that could block the transaction) 870000 2 timothy 2013-04-05 13:01:08 -0700 Chromium and V8 have left the building. Won't fix.