[Webkit-unassigned] [Bug 146448] JavaScriptCore performance is very bad on Windows

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=146448

--- Comment #15 from Hyungwook Lee <hyungwook.lee at navercorp.com> ---
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.

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