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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - JavaScriptCore performance is very bad on Windows"
href="https://bugs.webkit.org/show_bug.cgi?id=146448#c15">Comment # 15</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - JavaScriptCore performance is very bad on Windows"
href="https://bugs.webkit.org/show_bug.cgi?id=146448">bug 146448</a>
from <span class="vcard"><a class="email" href="mailto:hyungwook.lee@navercorp.com" title="Hyungwook Lee <hyungwook.lee@navercorp.com>"> <span class="fn">Hyungwook Lee</span></a>
</span></b>
<pre>I've disabled ENABLE_CONCURRENT_JIT in WebKit2 EFL port and measured Sun Spider 1.0.2 test as following.
WebKit Windows port 32bit Release: 442.4ms (SunSpider 1.0.2)
WebKit Windows port 64bit Release: Not yet tested (SunSpider 1.0.2)
WebKit2 Ubuntu EFL port 64bit Release: 164.1ms (SunSpider 1.0.2)
WebKit2 Ubuntu EFL port 64bit Reelase: 223.0ms (Disabled CONCURRENT_JIT)
I think ENABLE_CONCURRENT_JIT make performance improvement but it is not major reason for this issue.
Additionally, WebKit2 EFL port doesn't use FTL as below.
#if PLATFORM(GTK) && HAVE(LLVM) && ENABLE(JIT) && !defined(ENABLE_FTL_JIT) && CPU(X86_64)
#define ENABLE_FTL_JIT 1
#endif
It looks current issue doesn't related to JIT and it's related stuff.</pre>
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