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From: Peter Korsgaard <jacmet@sunsite.dk>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH RFC] zlib: Optimize decompression
Date: Thu, 19 Nov 2009 15:51:02 +0100	[thread overview]
Message-ID: <87aayiin55.fsf@macbook.be.48ers.dk> (raw)
In-Reply-To: <OFB05B522C.278EE073-ONC1257673.004FC0F1-C1257673.004FE110@transmode.se> (Joakim Tjernlund's message of "Thu\, 19 Nov 2009 15\:32\:29 +0100")

>>>>> "Joakim" == Joakim Tjernlund <joakim.tjernlund@transmode.se> writes:

Hi,

 >> On a mpc8347 board it's ~12% faster at decompressing the uImage (165ms).
 >> 
 Joakim> Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
 >> 
 >> Acked-by: Peter Korsgaard <jacmet@sunsite.dk>

 Joakim> Thanks, question: How does this compare with your lzo uncompress?

Lzo is still slightly faster, but it only about ~5% (60ms). This is at
400MHz with very slow flash. With slower cpu/faster flash the difference
would probably be bigger (it certainly was when I compared with zlib
before your optimization).

I can rerun that test, but first I need to figure out why 2009.11-rc1 is
more than 1 second slower than 2009.08.

-- 
Bye, Peter Korsgaard

  reply	other threads:[~2009-11-19 14:51 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-11-19 12:22 [U-Boot] [PATCH RFC] zlib: Optimize decompression Joakim Tjernlund
2009-11-19 14:07 ` Peter Korsgaard
2009-11-19 14:32   ` Joakim Tjernlund
2009-11-19 14:51     ` Peter Korsgaard [this message]
2009-12-05  0:32 ` Wolfgang Denk

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