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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: multi-process elisp compilation?
Date: Tue, 27 Jul 2021 05:23:43 +0300
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To: "Perry E. Metzger" <perry@piermont.com>
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> Date: Mon, 26 Jul 2021 15:44:36 -0400
> From: "Perry E. Metzger" <perry@piermont.com>
> 
> Howdy! Nowadays, most of us have multiprocessor desktops, but so far as 
> I can tell, when compiling elisp to .elc (or .eln) during make of Emacs, 
> the build only takes advantage of one processor. Is there a magic option 
> to configure that I missed that will use all my processors to compile 
> elisp during the build?

You mean, "make -jN" where N is the number of execution units?