[Webkit-unassigned] [Bug 98694] [Performance] Speed-up DOM tree traversal on ARM platforms

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=98694





--- Comment #14 from Kulanthaivel Palanichamy <kulanthaivel at codeaurora.org>  2012-10-11 16:55:09 PST ---
Test Results for the current patch:

  System Configuration:
  Mac Pro, 2 X 6-Core Intel Xeon @ 2.66 GHz, 24 GB RAM
  L2 Cache (per Core):    256 KB
  L3 Cache (per Processor):    12 MB
  WebKit revision : r130776

  Dromaeo : http://dromaeo.com/?id=181757,181771
  Stock WebKit - Dromaeo id 181771
  With optimization - Dromeao id 181757

  WebKit Performance test suite: https://bugs.webkit.org/attachment.cgi?id=168319 (attachment)
  First Column : Stock WebKit
  Second Column : With optimization, but not including NULL check in prefetch()
  Third Column : With optimization, including NULL check in prefetch()

    Observations: 
    - Not making NULL check for PLD addresse seems to have very negative impact on both X86 and ARM based architectures.
    - We have few cases were performance got regressed heavily due to the overhead of PLD target node calculations.

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