I'm impressed with the work and the progress. This site might be good for testing the javascript capability (and handling some big numbers) http://brainwallet.org/

This might be a good test for your engine.

http://peacekeeper.futuremark.com/

OWB-JIT now renders mandelbrot correctly ;)

Excellent work !

Thanks a lot bigfoot to give info about this project !

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Nice! Any early benchmark compared to traditional interpreter ?

@bigfoot

Great work! Can't wait to try it out!

Benchmarks please

It's a bit too early for real benchmarks, as my OWB is still full of debug output that slows things down considerably, but the Mandelbrot test I'm using seems to be somewhere in the region of 5 to 10 times as fast as the interpreter. But keep in mind that this is just the 'baseline JIT'. Webkit has another level of JIT called 'DFG' that promises further speedups through eliminating runtime type checking when possible, amongst other things.

This graph was recently posted with the caption "Figure 3. Relative speed-up (higher is better) on the Richards benchmark from each of the three tiers." to a Webkit blog post. While this graph only demonstrates a specific benchmark on x86, it still gives an idea about what kind of speedups are possible.

The more interesting question will be if one has to restart Odyssey within minutes instead of hours due to WebKit/JS related memleaks anyway .... :)

@bigfoot

Do you have any plans to eventually port DFG as well?

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That's the plan, yes. But considering how deep into the design the reliance on little endian runs in Webkit's Javascript engine, I want to make sure the first level is working correctly before I go any further.

@bigfoot

A great thank you for all your work! So, would I be wrong to think that with this JIT in place, OWB would load for example Youtube about as fast as any other modern browser? If so, that would be amazing!

I can't really say how any specific website is going to perform when the JIT is ready.

And a slightly more complicated demo, Tearable Cloth, now works in OWB-JIT.

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Cool!

Nice of you to report the progress, keep it coming!

congratulations I hope you can finish early, I would like to see if I can push a lot of my g4 350 mhz

Well, I've got enough Webkit issues fixed now that I can browse Morphzone (and write this comment) with JIT enabled!

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Public BETA forthcoming?

I don't want to make any more promises that I can't keep, but at this rate it is indeed looking good. However, keep in mind that while Morphzone loads, most other sites I've thrown at it still crash, so there's plenty of things to debug still.

Also, this is only the first level ("baseline") JIT, which isn't that much faster than the interpreter. I haven't started work on the second level ("DFG") yet, which will no doubt have its own set of problems to figure out.

Another site now loads without crashing

However, with my current level of debug output, it was too slow to really try any of the functionality. Loading the front page generated 130MB of debug output.

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Sounds like fun, wish i could be there ;)

Any progress?

Looking forward to this , great work bigfoot !!

Unfortunately there's no tangible progress to report at this moment. I'm currently moving to a new home, and it'll probably be a week or two before I can really get back to working on OWB.

Sorry again for all the delays.

BTW What happens to your patches for webkit and java script interpreter?
Are they commited to the official trunk?