Re: trying to understand poor performance of make + cygwin on W2K

[Eli Zaretskii]

On Tue, 30 Apr 2002, Ken Faiczak wrote:

> If I completely build our tree (about 
> then rerun the make from the top it takes 9.5 seconds on linux 
> 
> if I do the same test on the same machine running
> (machine P3-500 512MB)
> win2k +cygwin 1.3.9 +make (3.79.1)
> it takes 3.5 minutes
> 
> so 210 seconds versus 9 seconds.
> all its doing is recursing down the tree, testing the dependancies
> and determining it has nothing to do, so its not compiling anything
> its all make +cygwin, I think (ie no gcc invoked anywhere)
> 
> any ideas on what to try?
> is this an issue with the cygwin fork() implementation??

Does the Cygwin port supports parallelism?  I suggest to try a 
non-parallel run (by adding .NOTPARALLEL target to the Makefile's), and 
see if the results change.

It could also be an issue with fork.  The Cygwin mailing list is probably 
a better place to ask about this.