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From: Andrey Kiselev <dron@ak4719.spb.edu>
Date: Sat, 25 Sep 2004 01:58:34 +0400
To: tiff@remotesensing.org
Subject: Re: [Tiff] 3.7 vs. 3.6.1 performance hit
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On Thu, Sep 23, 2004 at 01:41:31PM -0400, Larry Grill wrote:
> I'm seeing a large performance hit with 3.7b vs. 3.6.1 compiled under
> MS VC7 or VC6. Our the code section loops through rows doing,
> TIFFReadEncodedStrip and TIFFWriteScanline. The perfomance difference
> is approximately 30% and I can compare with a simple recompile of our
> application linking one version of the library vs. the other.

Larry,

I think I know why the new libtiff is slower than the older one. I have
implemented a new feature (update compressed files in place), but this
results in perfomance degradation. I know how to improve things, so the
fix will come shortly.

							Andrey
-- 
Andrey V. Kiselev
Home phone:  +7 812 5274898  ICQ# 26871517
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