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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Define progn_ignore to run Fprogn and ignore output
Date: Tue, 27 Dec 2016 08:26:25 +0200
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To: Chris Gregory <czipperz@gmail.com>
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	(message from Chris Gregory on Mon, 26 Dec 2016 20:14:47 -0600)
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> From: Chris Gregory <czipperz@gmail.com>
> Date: Mon, 26 Dec 2016 20:14:47 -0600
> 
> This patch defines progn_ignore to do Fprogn but not return a result.
> This will minorly speed up all operations using `unwind_body'.

Thanks.  Can you give some numbers that show what kind of speed-up
this will yield?