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Cygwin 1.5 vs 1.7: speed
- From: Roland Schwingel <roland dot schwingel at onevision dot de>
- To: cygwin at cygwin dot com
- Date: Wed, 28 Oct 2009 12:37:10 +0100
- Subject: Cygwin 1.5 vs 1.7: speed
When evaluating 1.7 I do also conduct some speed tests with cygwin 1.5.
I am using 1.5.25 und 1.7.0-62 on windows xp sp3 32bit here for my tests
on a quad core machine with enough ram.
It seems that 1.7 is around 10-25% slower in my scenarios here. I did
some compilation tests. Each test was performed 10 times on each cygwin
I am using a private cygwin 1.5 build of the mingw-w64
gcc(4.4.2)/binutils(2.19) in cygwin to build on cygwin for mingw 32 and
The toolchain was (as already mentioned) build with cygwin 1.5 and is
just copied over to my 1.7 installation. The toolchain built with 1.5
appears to operate fine on 1.7.
When I compile I always compile to the local disk. When my sources are
located on the local harddrive compilation is around 10% slower with
cygwin 1.7 compared to 1.5 and around 25% slower if I place my sources
on samba 3.4 share (the linux samba server was purely private for me
during my tests). I am a little bit astonished about the speed gap when
putting the files local vs. putting them on a network share.
Any clues? I just made an additional test compiling stock libxml2-2.6.32
using the stock gcc3 coming with both cygwin versions and I am coming to
roughly the same numbers. Is 1.7 truly slower than 1.5 or aren't all
final optimizations done right now?
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