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From: guy%gorodish@Sun.COM (Guy Harris)
Newsgroups: comp.unix.wizards
Subject: Re: Big Programs Hurt Performance
Message-ID: <29557@sun.uucp>
Date: Wed, 30-Sep-87 13:49:35 EDT
Article-I.D.: sun.29557
Posted: Wed Sep 30 13:49:35 1987
Date-Received: Sun, 4-Oct-87 21:19:29 EDT
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> in order to assign two structures, the template used by pcc might be to
> call a function to do a byte copy, but the Vax has an instruction to do the
> copy...

...which code generated by PCC uses.  Not a good example.

> This kind of thing is the reason why e.g. Plexus is now compiling their
> kernels using the Green Hills native 68020 compiler rather than pcc,

Is not the Green Hills compiler an optimizing compiler (i.e., offering more
optimization than the standard VAX UNIX peephole optimizer), and is it not also
available for other machines (e.g., the NS32K series)?  I don't know that
non-retargetable compilers are necessarily that much better than retargetable
ones, these days.
	Guy Harris
	{ihnp4, decvax, seismo, decwrl, ...}!sun!guy
	guy@sun.com