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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [JSC] implement async functions proposal"
href="https://bugs.webkit.org/show_bug.cgi?id=156147#c98">Comment # 98</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [JSC] implement async functions proposal"
href="https://bugs.webkit.org/show_bug.cgi?id=156147">bug 156147</a>
from <span class="vcard"><a class="email" href="mailto:utatane.tea@gmail.com" title="Yusuke Suzuki <utatane.tea@gmail.com>"> <span class="fn">Yusuke Suzuki</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=156147#c97">comment #97</a>)
<span class="quote">> The dromaeo results for the latest patch are about 3-4% regressions for each
> test. With the branch prediction adjustment, there's a 5-10% improvement (If
> there's a command to dump results of run-perf-tests as text, I'll provide
> all the numbers).
>
> With the command `run-jsc-benchmarks --outer 10 --octane --benchmark
> "closure|jquery" baseline:~/git/WebKit2/WebKitBuild/Release/DumpRenderTree
> asyncawait:~/git/WebKit/WebKitBuild/Release/DumpRenderTree`, results are:
>
> baseline asyncawait
>
>
> closure 0.30989+-0.00551 0.30340+-0.00295
> might be 1.0214x faster
> jquery 3.65550+-0.01427 ! 3.78112+-0.03262 !
> definitely 1.0344x slower
>
> <geometric> 1.06425+-0.01004 ? 1.07103+-0.00613 ?
> might be 1.0064x slower
> ---
>
> The jquery results might look a little worse than previously described, but
> the fact that Dromaeo consistently does so much better with the branch
> predictions added goes a long way in my opinion.
>
> Ensuring that `m_runtimeFlags` is packed efficiently and accessed in cache
> more often will probably see some improvement, but hard to guess how much</span >
Personally, I think it is ok if we can track this in the separated bug after this change. (and we need to look into it :))</pre>
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