[Webkit-unassigned] [Bug 97905] [SVG] Update of element referenced by multiple 'use' nodes is absurdly slow

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=97905





--- Comment #2 from Florin Malita <fmalita at chromium.org>  2012-09-28 10:32:44 PST ---
This has the same profile as https://bugs.webkit.org/show_bug.cgi?id=97910, so I suspect it's the same problem:

+   3.81%  SignalSender  libpthread-2.15.so  [.] pthread_mutex_lock
+   3.65%  SignalSender  libpthread-2.15.so  [.] pthread_mutex_unlock
+   1.79%  SignalSender  libwebkit.so        [.] WTF::StringHasher::addCharactersToHash(unsigned short, unsigned short)
+   1.49%  SignalSender  libwebkit.so        [.] WTF::Locker<WTF::Mutex>::Locker(WTF::Mutex&)
+   1.39%  SignalSender  libwebkit.so        [.] WTF::intHash(unsigned long)
+   1.34%  SignalSender  libwebkit.so        [.] WTF::OwnPtr<WTF::Mutex>::operator*() const
+   1.03%  SignalSender  libwebkit.so        [.] WebCore::Node::getFlag(WebCore::Node::NodeFlags) const
+   1.01%  SignalSender  libwebkit.so        [.] WTF::Mutex::lock()
+   0.92%  SignalSender  libpthread-2.15.so  [.] pthread_getspecific
+   0.92%  SignalSender  libwebkit.so        [.] WTF::ThreadRestrictionVerifier::isSafeToUse() const
+   0.81%  SignalSender  libwebkit.so        [.] unsigned int WTF::StringHasher::computeHashAndMaskTop8Bits<unsigned short, &(WTF::StringHasher::defaultConverter(unsigned short))>(
+   0.78%  SignalSender  chrome              [.] (anonymous namespace)::FL_Previous_No_Check(void*)
+   0.69%  SignalSender  chrome              [.] PackedCache<36, unsigned long>::GetOrDefault(unsigned long, unsigned long) const
+   0.68%  SignalSender  libwebkit.so        [.] WTF::RefPtr<WTF::StringImpl>::get() const
+   0.67%  SignalSender  libwebkit.so        [.] WTF::currentThread()
+   0.61%  SignalSender  libwebkit.so        [.] WTF::Mutex::unlock()
+   0.58%  SignalSender  chrome              [.] base::subtle::Acquire_Load(long const volatile*)
+   0.57%  SignalSender  libwebkit.so        [.] WTF::ThreadIdentifierData::identifier()
+   0.56%  SignalSender  libwebkit.so        [.] WTF::StringHasher::defaultConverter(unsigned short)
+   0.56%  SignalSender  libwebkit.so        [.] WebCore::Node::document() const
+   0.55%  SignalSender  chrome              [.] TCMalloc_PageMap3<36>::get(unsigned long) const
+   0.55%  SignalSender  libwebkit.so        [.] WTF::RefCountedBase::derefBase()
+   0.53%  SignalSender  libwebkit.so        [.] WTF::RefCountedBase::ref()
+   0.53%  SignalSender  libwebkit.so        [.] WTF::Locker<WTF::Mutex>::~Locker()

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