Re: objective-c: how slow ?

[Marko Mikulicic]

Hi Alexander,

Could you please send me your patches or upload it somewhere ?
I'll try to port it on gcc 3.0.
I need more raw speed processing hudge data with gstep-db.

Thanks

Marko


Malmberg wrote:

> I did some hacking on gcc (2.95.2) a while back to try to make the
> message passing code more efficient and did some benchmarking. For the
> common case of a local, valid selector, calling an empty method took ~45
> cycles on a PII. After trying to make the generated code in the caller
> smaller and rewriting objc_msg_lookup* in assembly by hand (tried to
> optimize the common path through it), and making some other changes, I
> got it down to ~22 cycles. I could probably gain some more speed by
> sacrificing the smaller code, and possibly some more by more careful
> assembly.
>
> Anyway, gnustep base and gui compiled and worked fine with the new
> gcc/libobjc (well, not on the first try, but eventually). Once I get
> around to installing gcc 3.0, I'll probably try to move the changes
> over. If anyone's interested I could upload patches to 2.95.2 somewhere,
> or (given some time) change it to use the old call style and the new
> objc_msg_lookup, which is what I think would give the best performance.
>
> - Alexander Malmberg
>
>
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