Re: cloning the kernel - why long time in "Resolving 313037 deltas"

Alex Riesen writes:
 > Marco Roeland, Tue, Dec 19, 2006 10:13:19 +0100:
 > > > Not that I personally frequently clone large projects on Mac OS X.
 > > > But new users to Git might.  :-)
 > > 
 > > And perhaps the Cygwin version might benefit too.
 > 
 > Does not work there at all. Even errno is not set (0).

Haven't seen a reply to this yet.

Upgrade cygwin.dll. The fix is pretty recent (1.5.22 or something). Perhaps we now need a note in INSTALL.

Light testing seems to indicate that this change removes most of the system times while leaving user time mostly unchanged (though I don't know what cygwin time really reports in these categories). In the git repository this is about 30% of the total time. For another (slightly larger but with fewer objects) pack this still saves 20%. I haven't compared it with the NO_MMAP version (too lazy), but overall it's a win for cygwin as well (though we should note that cygwin's mmap seems to have reasonable performance).