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Re: The Emacs master is much slower than the emacs-27 branch.


From: Gregory Heytings
Subject: Re: The Emacs master is much slower than the emacs-27 branch.
Date: Sat, 05 Dec 2020 15:39:51 +0000
User-agent: Alpine 2.22 (NEB 394 2020-01-19)



Sorry.  I'm still too dumb to understand


No, you are definitely not! :-)


so I ask the following instead:

(1) I can always compare -O1, -O2 and -O3 builds because these were _not_ affected by Paul's changes. Right?


Yes.


(2) I cannot compare -Og builds because these _are_ affected by Paul's changes. At least Emacs 27 vs Emacs non-27 ones. Right?


Yes.


(3) I'm yet unsure about -O0 builds.  Are they (1)- or (2)-like?


Like (2), at least with GCC on 64-bit GNU/Linux. Apparently Eli does not see this on MS-Windows.



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