Subject: Re: Compiler timings on varous MVII NetBSDs etc.
To: Anders Magnusson <firstname.lastname@example.org>
From: Lord Isildur <email@example.com>
Date: 01/23/2001 16:15:29
that was ultrix though, which has two compilers: their cc, and vcc
the ultrix cc is not pcc
On Tue, 23 Jan 2001, Anders Magnusson wrote:
> > 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:
> ! cc:
> ! 44.7 real 44.4 user 0.0 sys
> ! vcc:
> ! 51.0 real 50.8 user 0.0 sys
> ! gcc:
> ! 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.
> -- Ragge