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Subject:	Re: Using ARM GNU GCC with Cygwin
To:	cygwin AT cygwin DOT com, Andrey Repin <anrdaemon AT yandex DOT ru>,
	Kaz Kylheku <920-082-4242 AT kylheku DOT com>
References:	<a63033db-7f0f-cf87-3de9-f544f4aa320b AT benjammin DOT net>
	<51717d4a9c861fd90b5f9a58b84b308a AT mail DOT kylheku DOT com>
	<1239492934 DOT 20200405004017 AT yandex DOT ru>
From:	Eliot Moss <moss AT cs DOT umass DOT edu>
Message-ID:	<6daa2aa8-b2b6-1f71-c787-06340d05644e@cs.umass.edu>
Date:	Sat, 4 Apr 2020 17:56:37 -0400
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On 4/4/2020 5:40 PM, Andrey Repin wrote:
> Greetings, Kaz Kylheku!
> 
>> On 2020-04-04 02:00, Ben wrote:
>>> Is there something else I'm missing?
> 
>> That by cross-compiling for your targets on Cygwin instead of a real
>> POSIX OS, you will something like double your compile times, if not
>> more.
> 
> Proof, please.

I would agree with the statement, at least subjectively.  There are various
things that I build on Linux, even in Linux virtual machines running on the
same Windows laptop, and Cygwin builds take perceptibly longer.  Some of
this is down to the cost of fork() no doubt -- configure, and perhaps gcc
itself, tend to spin off lots of short jobs, which tends to expose the
fork overhead.  Not sure if anything else is slower.  Obviously the main
part of the computation in the compiler is the same.

Regards - Eliot Moss
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