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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [ES6] "super" and "this" should be lexically bound inside an arrow function and should live in a JSLexicalEnvironment"
href="https://bugs.webkit.org/show_bug.cgi?id=149338#c164">Comment # 164</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [ES6] "super" and "this" should be lexically bound inside an arrow function and should live in a JSLexicalEnvironment"
href="https://bugs.webkit.org/show_bug.cgi?id=149338">bug 149338</a>
from <span class="vcard"><a class="email" href="mailto:fpizlo@apple.com" title="Filip Pizlo <fpizlo@apple.com>"> <span class="fn">Filip Pizlo</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=149338#c160">comment #160</a>)
<span class="quote">> (In reply to <a href="show_bug.cgi?id=149338#c159">comment #159</a>)
> > (In reply to <a href="show_bug.cgi?id=149338#c158">comment #158</a>)
> > > (In reply to <a href="show_bug.cgi?id=149338#c157">comment #157</a>)
> > > > (In reply to <a href="show_bug.cgi?id=149338#c156">comment #156</a>)
> > > > > (In reply to <a href="show_bug.cgi?id=149338#c155">comment #155</a>)
> > > > > > (In reply to <a href="show_bug.cgi?id=149338#c154">comment #154</a>)
> > > > > > > Did anyone run performance tests on this?
> > > > > >
> > > > > > <a href="https://bugs.webkit.org/attachment.cgi?id=265179">https://bugs.webkit.org/attachment.cgi?id=265179</a>
> > > > >
> > > > > That's in debug mode. Debug mode performance numbers are not meaningful.
> > > > >
> > > > > We should make sure to do release mode performance testing of patches like
> > > > > this.
> > > >
> > > > I didn't run the tests so I don't know for sure but the results text result
> > > > looks like a release build. What made you say it was Debug?
> > >
> > > The performance is very bad in absolute terms.
> > >
> > > I also just noticed that the performance numbers are super noisy.
> > >
> > > Either way, someone needs to run independent performance numbers on this
> > > because these don't look right.
> >
> > I'll run them tonight.
>
> When measuring perf in Linux, I can see these noisy result.
> On the other hand, when executing it in OSX with exactly the same
> run-jsc-benchmarks cmd,
> I can get somewhat solid result. So usually I measure perf on OSX machine.
> (In Linux, I ensured that cpu freq is fixed as "performance" mode, not
> "ondemand")
> I guess that is due to FTL's system allocator... But anyway, retaking it in
> OSX is nice.</span >
I've run benchmarks on Linux, and I don't see it being this slow.</pre>
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