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SunSpider and JavaScript Speed

I ran SunSpider with Safari 3.0.4 and the latest WebKit nightly. The results in a nutshell? The new JavaScript engine in the WebKit nightly build (Dec.19) is 2.83x as fast as that in Safari 3.0.4.

** TOTAL **:   *2.83x as slow*   3021.6ms +/- 0.7%   8554.6ms +/- 0.2%   significant

I'm considering running the Safari nightly builds as my browser (over Safari). However, the only "pre-built" tool out there fails to do three things that I'd want: 1) Rename "WebKit" to "Safari," 2) Set itself as the default browser, and 3) "Reopen All Windows From Last Session." I could hack this together with a combination of cron jobs and AppleScript, but I'm not sure it's worth it. Perhaps I'll just manually do it now and then.