[Webkit-unassigned] [Bug 132229] Coalesce responses on network process side

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=132229





--- Comment #22 from Antti Koivisto <koivisto at iki.fi>  2014-04-29 23:36:37 PST ---
On web process side we spend 1.1% of total CPU time simply receiving IPC messages (this includes UI process messages too) and forwarding them to client. This does not include any type-specific decoding.

Running Time    Self        Symbol Name
771.0ms    1.2%    7,0              _dispatch_source_invoke$VARIANT$mp
760.0ms    1.1%    2,0               _dispatch_source_latch_and_call
719.0ms    1.1%    10,0                IPC::Connection::receiveSourceEventHandler()
275.0ms    0.4%    4,0                 IPC::MessageDecoder::MessageDecoder(IPC::DataReference const&, WTF::Vector<IPC::Attachment, 0ul, WTF::CrashOnOverflow>)
215.0ms    0.3%    11,0                 IPC::Connection::processIncomingMessage(std::__1::unique_ptr<IPC::MessageDecoder, std::__1::default_delete<IPC::MessageDecoder> >)
158.0ms    0.2%    1,0                 mach_msg
43.0ms    0.0%    1,0                 vm_deallocate
13.0ms    0.0%    12,0                 WTF::fastMalloc(unsigned long)
3.0ms    0.0%    3,0                 WTF::Vector<char, 4160ul, WTF::CrashOnOverflow>::resize(unsigned long)

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