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On Wed, Jun 20, 2012 at 11:48:52PM -0600, Eric Eide proclaimed:
> Maybe I screwed something up; I'm no Windows/Cygwin expert. Maybe my clang is
> really really slow, even though I --enable-optimized. "time clang --version"
> consistently reports 1.5s on my Windows box.
It's dangerous to admit to being a Windows/Cygwin expert, and I don't know
that I qualify, but here is a possibility: IIRC, C-Reduce forks a bunch to
do its work. fork() isn't directly supported by Windows, so Cygwin has to
fake it and it is an expensive operation. My guess is that this is where
the performance hit is coming from.
http://cygwin.com/faq/faq.api.html#faq.api.fork
-Kirk
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