On Tue, Jul 30, 2013 at 10:39 AM, Eli Zaretskii <e...@gnu.org> wrote: >> From: Pavel Fedin <p.fe...@samsung.com> >> Date: Tue, 30 Jul 2013 14:42:23 +0400 >> >> Please take this patch, Cygwin team told that they would like to integrate >> with upstream. I have already posted it some time ago but got no reply. >> The patch significantly improves performance of Make under Cygwin. > > Thanks. > > Is there any discussion we could read about that with the details of > the problem and how/why does the proposed patch solves it?
fork() is a very expensive operation in cygwin. we are seeing that in LibreOffice build a lot. I will try to pick up that patch and report numbers on it (we have a pretty big make, with 125K+ targets http://skyfromme.wordpress.com/2013/02/28/one/ ) > > In general, I feel it's wrong to do this: Cygwin is a Posix platform, > so it should be using the Posix code, to be as compatible with other > Posix platforms as possible. EMX is not a Posix platform, so using > its code will likely make the Cygwin Make deviate from Posix behavior > at times. in theory you are right... in practice Cygwin maybe be posix, but it's underlying OS is not and the emulation layer can be very costly. Norbert _______________________________________________ Bug-make mailing list Bug-make@gnu.org https://lists.gnu.org/mailman/listinfo/bug-make
