[PATCH] Cygwin: Speed up mkimport

[Achim Gratz]

Achim Gratz writes:
> b) Open up two pipes to an "xargs -P $ncpu/2 L 1 …" and feed in the file
> names.

That actually works, but the speedup is quite modest on my system
(4C/8T) even though I've allowed it to use unlimited resources.  So it
basically forks slower than the runtime for each of the invocations is.
Some more speedup can be had if the assembler is run on actual files in
the same way, but the best I've come up with goes from 93s to 47s and
runs at 150% CPU (up from 85%).  Most of that time is spent in system,
so forking and I/O.


Regards,
Achim.
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