Re: Loop jamming!?

Christopher Glaeser <cdg@nullstone.com>
18 Jul 1997 12:27:19 -0400

          From comp.compilers
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[4 later articles]
| List of all articles for this month |
From: Christopher Glaeser <cdg@nullstone.com>
Newsgroups: comp.compilers
Date: 18 Jul 1997 12:27:19 -0400
Organization: Nullstone Corporation
Keywords: optimize

> In the extreme case, the slower loop is not slowed down any more
> by merging another loop with it.


Not true. In the extreme case, performance can actually decrease. This
can occur, for example, when the fusion of the loops cause cache
conflicts that were not present when the loops are run separately.


See http://www.nullstone.com/htmls/category/fusion.htm for a brief
description of loop fusion.


Best regards,
Christopher Glaeser cdg@nullstone.com
Nullstone Corporation http://www.nullstone.com
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