We had this discussion couple of times already, but I'll try to recap. On Sun, Jan 11, 2009 at 12:57 PM, inhahe <[email protected]> wrote: > With trace trees, hidden classes, aggressive type speculation, etc., > javascript engines run code about as fast as unoptimized C. > And I know that Python isn't any more intractable than Javascript > because pyjamas automatically translates from one to the other.
Well, wrong: 1. pyjamas is translating python syntax to js syntax (even not all of them). Which mean mostly that semantics are python. That said, you cannot run the same program under python and under js after pyjamas and expect the same result. Simple example would be as follow: d[index] In python, if d is a dictionary, this will raise KeyError, if d is a list this will raise IndexError, if d is a custom object, it'll try to call it's __getitem__. In JS however (after pyjamas) this will simply be translated to d[index], which will return undefined if index is not there (and not raise any exception). 2. python is far more complex than javascript, someone tried to count LOC of our python implementation vs our javascript implementation and it was something in order of 6-10x more code for python. It's also far more dynamic. 3. Psyco runs programs (let's say integer computations) as far as unoptimized C. Our prototype JIT does as well and we're working hard on improving things (in fact we work a lot on JIT these days). > > So however you're doing it now.. you're doing it wrong. ;) Well, tell us how to do it better/faster? Your points are rather shallow as it seems you didn't look into anything in detail. Look deeper, maybe you can give us a useful advice. > > If CPython won't do it, maybe you will.. Thanks for trust :) cheers, fijal _______________________________________________ [email protected] http://codespeak.net/mailman/listinfo/pypy-dev
