I will look deeper into this but would appreciate suggetsions. 0.0% 21.2% XUL nsInputStreamReadyEvent::Run() 0.0% 21.2% XUL nsInputStreamPump::OnInputStreamReady(nsIAsyncInputStream*) 0.0% 18.1% XUL nsInputStreamPump::OnStateStop() 0.0% 18.1% XUL nsJARChannel::OnStopRequest(nsIRequest*, nsISupports*, unsigned int) 0.0% 11.0% XUL nsParser::OnStopRequest(nsIRequest*, nsISupports*, unsigned int) 0.0% 11.0% XUL nsParser::ResumeParse(int, int, int) 0.0% 11.0% XUL nsParser::DidBuildModel(unsigned int) 0.0% 11.0% XUL XULContentSinkImpl::DidBuildModel()

This appears to be us parsing stuff, probably XML (XUL or XBL). Is that surprising?

I'm not surprised, just wondering if this can be optimized.

Digging deeper... 0.0% 12.3% XUL nsJARChannel::OnStopRequest(nsIRequest*, nsISupports*, unsigned int) 0.0% 12.3% XUL nsUnicharStreamLoader::OnStopRequest(nsIRequest*, nsISupports*, unsigned int) 0.0% 12.3% XUL SheetLoadData::OnStreamComplete(nsIUnicharStreamLoader*, nsISupports*, unsigned int, nsIUnicharInputStream*) 0.0% 12.3% XUL CSSLoaderImpl::ParseSheet(nsIUnicharInputStream*, SheetLoadData*, int&) 0.0% 12.2% XUL CSSLoaderImpl::SheetComplete(SheetLoadData*, unsigned int) 0.0% 12.2% XUL nsXULDocument::DoneWalking() 0.0% 12.2% XUL nsXULDocument::StartLayout() 0.0% 12.2% XUL PresShell::InitialReflow(int, int) 0.0% 6.4% XUL nsCSSFrameConstructor::ContentInserted(nsIContent*, nsIContent*, int, nsILayoutHistoryState*) 0.0% 6.4% XUL nsCSSFrameConstructor::ConstructDocElementFrame(nsIContent*, nsILayoutHistoryState*, nsIFrame**) 0.0% 4.8% XUL nsBindingManager::ProcessAttachedQueue(unsigned int) 0.0% 0.7% XUL nsCSSFrameConstructor::ConstructRootFrame(nsIFrame**) 0.0% 0.3% XUL nsCSSFrameConstructor::ProcessPendingRestyles() 0.0% 0.1% XUL CSSParserImpl::Parse(nsIUnicharInputStream*, nsIURI*, nsIURI*, nsIPrincipal*, unsigned int, int)

And a short summary: 0.0% 12.2% XUL PresShell::InitialReflow(int, int) 0.0% 6.4% XUL nsCSSFrameConstructor::ContentInserted(nsIContent*, nsIContent*, int, nsILayoutHistoryState*) 0.0% 4.8% XUL nsBindingManager::ProcessAttachedQueue(unsigned int) 0.0% 0.7% XUL nsCSSFrameConstructor::ConstructRootFrame(nsIFrame**) 0.0% 0.3% XUL nsCSSFrameConstructor::ProcessPendingRestyles()