[cpr]

Good to see the Webkit team (mostly Apple) continue putting serious energy into JS performance. Take a bit of guts to throw out the whole LLVM layer in order to get compilation performance...

It's also encouraging to see them opening up about future directions rather than just popping full-blown features from the head of Zeus every so often. (Not that they owe us anything... ;-)

(Edit: it's also damned impressive for 2 people in 3-4 months.)

[MrBuddyCasino]

Gutsy move indeed. Though I wonder, what was the development cost in real life cash for gaining those 5% of performance?

[pizlonator]

3 months. Two people working on it (me and @awfulben).

[titzer]

Nice work, Fil. Looks cool.

[pizlonator]

Thanks! :-) Looking forward to more write-ups about TurboFan!

[MrBuddyCasino]

Ok, thats impressive. I'll show myself out.

[ignoramous]

Great work! Time to update... https://en.wikipedia.org/wiki/WebKit#JavaScriptCore

[bluejekyll]

Out of curiousity, did you look at improving LLVM compile times? I didn't get that out of the article.

Awesome write up btw.

[om2]

As Phil said, the development cost was not that high all things considered. But even if it was - think about the number of user-hours that 5% is leveraged across, and the resulting time savings and battery life savings for those users. It would be worth investing even more than we did for 5%!

[ksec]

Considering there are now 1Billion Active iOS devices, that 5% saving is huge!

I wonder if this will make in time for iOS10.