On Wed, Jul 01, 2009 at 06:55:35AM +0100, Andy Koppe wrote: >2009/6/23 Christopher Faylor: >>>If posix_spawn() ever gets implemented in Cygwin to >>>avoid the slowness of fork(), /bin/sh might well change to the first >>>shell that supports it. >> >> It's really somewhat of an urban myth about Cygwin's fork being slow. >> Cygwin's exec is also pretty slow. ??I'm not really sure that posix_spawn >> would cause any kind of performance improvement. > >Ah, right. So is it Windows' CreateProcess() itself that's slow? Or is >it some of the additional stuff that exec() needs to deal with? >Signals? The hidden console?
The majority of the exec code is in spawn.cc - spawn_guts(). You can see for yourself that this is not a simple function. Just remember that neither fork nor exec have native Windows analogues. cgf -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
