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<p class="MsoNormal"><span style="color:#1F497D">Okay. Thanks for the input.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Let me ask a slightly different question (let me know if this should be a different thread). As background info, we are trying to optimize JavaScript execution without JIT support. Due to security restrictions
by First Party, we are not allowed to JIT the JavaScript on some platforms. So we are looking for ideas on how to optimize runtime performance.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">One of the idea we have had internally was what if we could AOT compile normal JavaScript (not same as asm.js) that we do not intend to update. I looked at
<a href="http://trac.webkit.org/wiki/JavaScriptCore">http://trac.webkit.org/wiki/JavaScriptCore</a> which mentions that type inference/profiling happens in the LLInt/Baseline JIT tier and used in DFG JIT layer. Would it be a bad idea to move/use the type inference
in LLInt layer? What if such thing was possible, we preload our JS and make it run say few thousand times before actual execution need (so that we get better performance)?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Is there any other idea we can pursue for better performance by just using LLInt layer? Or the general thought process is that if you want better javascript performance, JIT support is expected.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Arpit <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> Filip Pizlo [mailto:fpizlo@apple.com] <br>
<b>Sent:</b> Monday, November 24, 2014 8:19 AM<br>
<b>To:</b> Baldeva, Arpit<br>
<b>Cc:</b> webkit-dev@lists.webkit.org<br>
<b>Subject:</b> Re: [webkit-dev] asm.js optimization path?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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On Nov 24, 2014, at 7:56 AM, Baldeva, Arpit <<a href="mailto:abaldeva@ea.com">abaldeva@ea.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">I was wondering if JavaScriptCore community ever considered adding optimization path for asm.js (<a href="http://asmjs.org/">http://asmjs.org/</a> ) ? I searched webkit bugzilla and did not find any relevant discussions.
<o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Any opinions in favor/against it? <o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">We strive to optimize the full JavaScript language rather than a subset. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">I would be opposed to any change in this strategy. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">-Filip<o:p></o:p></span></p>
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<br>
<o:p></o:p></span></p>
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<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal">Thanks<o:p></o:p></p>
<p class="MsoNormal">Arpit<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman",serif">_______________________________________________<br>
webkit-dev mailing list<br>
<a href="mailto:webkit-dev@lists.webkit.org">webkit-dev@lists.webkit.org</a><br>
<a href="https://lists.webkit.org/mailman/listinfo/webkit-dev">https://lists.webkit.org/mailman/listinfo/webkit-dev</a><o:p></o:p></span></p>
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