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TIFF and LibTiff Mail List Archive

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2004.09.23 17:41 "[Tiff] 3.7 vs. 3.6.1 performance hit", by Larry Grill
2004.09.24 21:58 "Re: [Tiff] 3.7 vs. 3.6.1 performance hit", by Andrey Kiselev

2004.09.24 21:58 "Re: [Tiff] 3.7 vs. 3.6.1 performance hit", by Andrey Kiselev

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