Date: Tue, 27 Apr 1999 13:38:15 +0100
From: cmatraki AT ee DOT ucl DOT ac DOT uk (Chris Matrakidis)
Message-Id: <199904271238.NAA10314@melchard.ee.ucl.ac.uk>
To: djgpp-workers AT delorie DOT com
Subject: Re: [dma AT hpesdma DOT fc DOT hp DOT com: Performance Observation]
X-Sun-Charset: US-ASCII
Reply-To: djgpp-workers AT delorie DOT com

> From dj-admin AT delorie DOT com  Mon Apr 26 18:05:42 1999
> Date: Mon, 26 Apr 1999 18:03:56 +0100
> From: cmatraki AT ee DOT ucl DOT ac DOT uk (Chris Matrakidis)
> To: djgpp-workers AT delorie DOT com
> I'll reinstall 2.7.2 today and see if I can spot anything in the generated code.
> 

The performance drop seems to be an alignment problem. Specifically, with the
fft benchmark, gcc 2.7.2 is faster than gcc 2.8.1. There is no considerable
differnce in the generated code, and some experiments with mixed compilation
seem to confim this. Recent version of egcs are supposed to fix this.