On 2010-11-25, at 24:15 , Marc Feeley wrote:
Brendan Eich gave a presentation on the next spec for JS:
http://hacks.mozilla.org/2010/07/brendan-eich-at-jsconf-2010-whats-coming-in...
It fixes many of JS's problems. It also looks more and more like Scheme! (no parens... but rest parameters, let, continuations, weak references, modules, ...)
So, it seems like we don't have to worry too much about optimizing when programs use the arguments array. But we might have to worry about JS getting the kitchen sink too in a near future :) Also, the last few minutes of the questions are really interesting (the part where he talks about how JITs behave when their assumptions break...)
Bruno