You may have noticed, or not, but WebKit 1.1.3, which has been released a few days ago, is available in experimental. The great news is that we now have a real maintenance team, because I now have a co-maintainer, who actually did most of the work getting the 1.1.x releases in shape for experimental.

Now, some JavaScript performance figures, as I have been doing for most WebKit releases I uploaded to the archive, with a recap of previous episodes:

• svn 27674: 3932.0ms
• svn 31842: 2612.2ms
• release 1.0.1: 1658.4ms
• release 1.1.3: 1333.2ms

All there tests have obviously been run on the same machine, under the same conditions. The machine in question is my x86-64 laptop, which means all these test are with a x86-64 binary.

This also means the last release, 1.1.3, doesn't take advantage of the Just In Time JavaScript compiler, which is only available on x86 binaries.

With the x86 binaries under a x86 personality chroot, I get under one second:

• release 1.1.3, with JIT, x86: 985.4ms

But, in the last few days, I've been working on getting JIT first to build and then to work on x86-64 linux, and with the help of folks on the webkit-dev list, that just happened. And the result is just... wow.

• release 1.1.3, with JIT, x86-64: 623.0ms

(Note that a few tests are actually slower than on x86)

That's so many times faster than what we had a year ago that it's almost unbelievable.

Expect the next upstream release, planned for some time in the near future, to have my patches applied. In the meanwhile, you can get them here and here.

2009-03-20 23:27:39+0900

webkit

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