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NNTP-Posting-Date: Thu, 13 Jun 2019 10:47:32 -0500
From: Dennis Lee Bieber <wlfraed@ix.netcom.com>
Newsgroups: comp.lang.ada
Subject: Re: gprbuild -j8 on Windows 8.1?
Date: Thu, 13 Jun 2019 11:47:31 -0400
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Xref: reader01.eternal-september.org comp.lang.ada:56633
Date: 2019-06-13T11:47:31-04:00
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On Wed, 12 Jun 2019 20:10:02 -0700 (PDT), Stephen Leake
<stephen_leake@stephe-leake.org> declaimed the following:

>I'm using GNAT Community 2018.
>
>I have a main program that takes an annoyingly long time to compile, so I tried 
>

	How many .adb files make up that program? As I read the documentation
...

>gprbuild -j8
>

... mainly spawn separate compilers; for a single program it still uses a
single binder/linker process. If most of your time is in the binder/linker,
the option probably won't gain you much time.

	Even if it does help some, take into account that you will have process
startup time for each compiler that gets spawned, along with potential I/O
contention. If a lot of the .adb files are fairly small, the startup time
may be a significant factor.


-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
	wlfraed@ix.netcom.com    http://wlfraed.microdiversity.freeddns.org/