[Webkit-unassigned] [Bug 69690] DFG does not have flow-sensitive intraprocedural control flow analysis

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=69690





--- Comment #3 from Filip Pizlo <fpizlo at apple.com>  2011-10-07 20:52:12 PST ---
This looks like it still needs work, but even now, it's a speed-up on V8.



Benchmark report for V8.

VMs tested:
"TipOfTree" at /Volumes/Data/pizlo/quinary/OpenSource/WebKitBuild/Release/jsc
"CFA" at /Volumes/Data/pizlo/OpenSource/WebKitBuild/Release/jsc

Collected 12 samples per benchmark/VM, with 4 VM invocations per benchmark. Used 1 benchmark
iteration per VM invocation for warm-up. Used the jsc-specific preciseTime() function to get
microsecond-level timing. Reporting benchmark execution times with 95% confidence intervals
in milliseconds.

                       TipOfTree                  CFA                                       

crypto              71.8876+-0.2979    !    73.8087+-0.2691       ! definitely 1.0267x slower
deltablue          226.0413+-2.3269    ?   226.1569+-2.0996       ?
earley-boyer        90.5814+-0.4154    !    91.8870+-0.3324       ! definitely 1.0144x slower
raytrace            58.4061+-0.3131    !    59.3055+-0.3795       ! definitely 1.0154x slower
regexp             102.7642+-0.2884    ?   103.4826+-0.4524       ?
richards           204.4922+-0.8884    ^   175.1322+-0.3993       ^ definitely 1.1676x faster
splay               95.6563+-0.7585    ?    96.4660+-0.2593       ?

<arithmetic>       121.4042+-0.3672    ^   118.0341+-0.2739       ^ definitely 1.0286x faster
<geometric> *      108.1240+-0.2137    ^   106.8489+-0.1572       ^ definitely 1.0119x faster
<harmonic>          97.7987+-0.1951    ?    97.9595+-0.1685       ?

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