Slow shell script execution on Cygwin

[Robert Ögren]

Brian Dessent wrote:
>>My questions for you:
>>1. Do these numbers seem reasonable?
> 
> Yes, unfortunately.  Heavy fork()-exec() based scripts just take
> forever.

Ok.

>>2. Is there anything (apart from cross-compiling on Linux :) ) that can
>>be done to increase script execution speed?
> 
> You can try mounting your /usr/bin as cygexec.  The manpage for mount
> has some information.  From my understanding, the way this works is that
> when a Cygwin process goes to execute a binary, it checks the mount
> table.  If that binary is mounted on a path that is marked "cygexec" it
> assumes that it is a Cygwin binary and skips a bit of the normal
> song-and-dance, because it knows that it can just communicate directly
> with the child process via the Cygwin shared memory area after the
> process has started.  I'm not entirely sure of how much of a speedup can
> be expected, or whether it's significant or not, but it's worth testing.

Thank you for the suggestion. I tried it, and it reduced the time for a 
full make of glib by about 2 seconds, but increased the configure time 
by 2 seconds on average. Interesting...

Thanks for the reply,
Robert

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