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Slow FORTRAN formatted output using cygwin 1.5.xx
- From: "Impagnatiello Fabrizio" <Fabrizio dot Impagnatiello at aleniaspazio dot it>
- To: <cygwin at cygwin dot com>
- Date: Fri, 29 Apr 2005 16:26:55 +0200
- Subject: Slow FORTRAN formatted output using cygwin 1.5.xx
I wrote lot of FORTRAN programs using massive formatted file outputs.
When passed from 1.3.22 (one of last 1.3.xx) to 1.5.xx (all tested), the
writing/reading performance of relevant SW modules slowed down to few %
of before experienced performance (typically 20-30 times worse).
When compiling the same code with -mno-cygwin, the performance increases
Then, there are some cygwin1.dll entry points for IO functions that have
been either strongly damaged or unoptimised ??
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