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Bug 895222, improve skippability optimization for nodes, r=mccr8

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--HG--
extra : rebase_source : ce3ebc2020a26d22f7cf2636d63657a8fe6ebb2d
This commit is contained in:
Olli Pettay 2013-07-22 20:47:20 +03:00
parent df49bdaa51
commit 4399ddbfe6
1 changed files with 5 additions and 5 deletions
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10
content/base/src/FragmentOrElement.cpp
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@ -339,10 +339,10 @@ GetJSObjectChild(nsWrapperCache* aCache)
}
static bool
NeedsScriptTraverse(nsWrapperCache* aCache)
NeedsScriptTraverse(nsINode* aNode)
{
JSObject* o = GetJSObjectChild(aCache);
return o && xpc_IsGrayGCThing(o);
return aNode->PreservingWrapper() && aNode->GetWrapperPreserveColor() &&
!aNode->IsBlackAndDoesNotNeedTracing(aNode);
}
//----------------------------------------------------------------------
@ -358,11 +358,11 @@ NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(nsChildContentList)
// nsChildContentList only ever has a single child, its wrapper, so if
// the wrapper is black, the list can't be part of a garbage cycle.
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsChildContentList)
return !NeedsScriptTraverse(tmp);
return tmp->IsBlack();
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsChildContentList)
return !NeedsScriptTraverse(tmp);
return tmp->IsBlackAndDoesNotNeedTracing(tmp);
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
// CanSkipThis returns false to avoid problems with incomplete unlinking.