[Webkit-unassigned] [Bug 156147] [JSC] implement async functions proposal

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=156147

--- Comment #113 from Yusuke Suzuki <utatane.tea at gmail.com> ---
The performance of the Parser.h / Parser.cpp reverted version is the following.
It gives us super nice insight that the cause of the code-load regression should reside in Parser.cpp's change.

Generating benchmark report at /home/yusukesuzuki/dev/WebKit/baseline_patched_Octane_hanayamata_20160529_0328_report.txt
And raw data at /home/yusukesuzuki/dev/WebKit/baseline_patched_Octane_hanayamata_20160529_0328.json

Benchmark report for Octane on hanayamata.

VMs tested:
"baseline" at /home/yusukesuzuki/dev/WebKit/WebKitBuild/old/Release/bin/jsc
"patched" at /home/yusukesuzuki/dev/WebKit/WebKitBuild/async/Release/bin/jsc

Collected 10 samples per benchmark/VM, with 10 VM invocations per benchmark. Emitted a call to
gc() between sample measurements. 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.

                         baseline                  patched                                      

closure              0.62566+-0.00522          0.62292+-0.00696       
jquery               8.03686+-0.02728          7.96035+-0.06515       

<geometric>          2.24234+-0.00828          2.22676+-0.01878         might be 1.0070x faster

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