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Re: GCC 4.0, Fast Math, and Acovea
- From: tbp <tbptbp at gmail dot com>
- To: Scott Robert Ladd <scott dot ladd at coyotegulch dot com>
- Cc: Uros Bizjak <uros at kss-loka dot si>, gcc at gcc dot gnu dot org
- Date: Tue, 3 May 2005 03:01:37 +0200
- Subject: Re: GCC 4.0, Fast Math, and Acovea
- References: <42728C99.6020906@kss-loka.si> <4fc48eb10504300514510d90f7@mail.gmail.com> <427626F4.9020405@coyotegulch.com>
- Reply-to: tbp <tbptbp at gmail dot com>
On 5/2/05, Scott Robert Ladd <scott.ladd@coyotegulch.com> wrote:
> You might want to a look at my just-published review of GCC 4.0, where I
> compare it's performance on some well-known applications, including LAME
> and POV-Ray, on Pentium 4 and Opteron. In terms of POV-Ray, 4.0 produced
> a smaller executable that was slightly slower than did 3.4.3. You can
> find the full review at:
While POV has an impressive array of features and is quite valuable as
a large FP intensive legacy standard for compiler writers (or
raytracer writers :), i wouldn't consider it state of the art or a
speed daemon either; to put it bluntly it's incredibly slow.
For those reasons i consider it's not representative of the kind of
computationnal performance gcc can extract from a modern CPU at all:
again, in my own experience, gcc4.x is light years away from previous
versions.
Now i'm not familiar enough with the other cited sources to comment.