Subject: Re: Compiler timings on varous MVII NetBSDs etc.
To: None <email@example.com, firstname.lastname@example.org, email@example.com>
From: Matt Thomas <firstname.lastname@example.org>
Date: 01/23/2001 10:48:18
At 01:32 PM 1/23/2001 -0500, Thor Lancelot Simon wrote:
>pcc is a *terrible* compiler. If we shipped pcc instead of gcc (not that
>we can, due to licensing; SCO owns the code) you'd be complaining about
>how slowly everything *else* on your system ran, instead of how slowly
>the compiler ran. Your system may be slow now, but if you rebuilt the
>world with pcc, it would be a LOT WORSE.
pcc does sucks pond water. Compilation time should not be what we are
comparing, but execution time.
>Gcc is not a very good compiler. On the other hand, it's by far the best
>compiler available for the VAX. It could probably be tweaked to be better,
>but I don't know how _much_ better.
I can answer that. I've been working on GCC's code generation for VAX as
part of the ELF work. I've been reducing the number of instruction by
about 4-8% and the code size by the same. I've been adding optimizations
and peepholes to speedup and reduce code size. In -current, I've tweaked
vax/include/macros.h to make many of the inlines more efficient.
Matt Thomas Internet: email@example.com
3am Software Foundry WWW URL: http://www.3am-software.com/bio/matt/
Cupertino, CA Disclaimer: I avow all knowledge of this message