linux-kernel - Re: [PATCH] zlib: Optimize inffast even more

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Message-ID: <OF7CD0497E.D92BC1B1-ONC125766C.0028EF03-C125766C.0030A731@transmode.se>
Date:	Thu, 12 Nov 2009 09:51:25 +0100
From:	Joakim Tjernlund <joakim.tjernlund@...nsmode.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, Richard Purdie <rpurdie@...ys.net>
Subject: Re: [PATCH] zlib: Optimize inffast even more

Andrew Morton <akpm@...ux-foundation.org> wrote on 12/11/2009 00:24:45:
>
> On Mon, 9 Nov 2009 11:22:16 +0100
> Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se> wrote:
>
> > This improves zlib: Optimize inffast when copying direct from output
> > and gives another 3-4% improvement for my MPC8321 target.
> > Does not need CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS,
> > uses get_unaligned() but only in one place.
> > The copy loop just above this one can also use this
> > optimization, but I havn't done so as I have not tested if it
> > is a win there too.
> >
> > Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@...nsmode.se>
> > ---
> >
> >  Someone with a little endian target should test too.
>
> eh?  That requires a PC.  Can't you test it??

It needs something that actually uses the inflate too on that PC and
I don't have that handy.
Anyhow, I downloaded zip and made the changes and tested a little, found
a problem. Will resend a new patch with everything in it soon.

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