Subject: Re: Compiler timings on varous MVII NetBSDs etc.
To: Lord Isildur <email@example.com>
From: Anders Magnusson <firstname.lastname@example.org>
Date: 01/23/2001 22:12:14
> pcc also generates fast code. faster than gcc on vax at any rate.. i
> should do a more involved comparison than the little shootout between gcc
> and pcc and ultrix/vax cc that ragge and i did.. though we had machines
> of somewhat different characteristics, but pcc2's code was at least as
> fast as gcc's best optimization.
Well, I think you have a bad memory :-)
Here's the test again:
! Running the command:
! % echo "2 9999 ^ 3 6308 ^ / p" | /usr/bin/time ./dc
! gave the following results:
! 44.7 real 44.4 user 0.0 sys
! 51.0 real 50.8 user 0.0 sys
! 31.3 real 31.1 user 0.0 sys
This shows that pcc's code is almost 50% _slower_ than the gcc code,
and the DEC C compiler is even worse...
Gcc takes quite a while to compile, but generates rather good code.
There are other problems making the VAXen slow, though.