GNU bug report logs - #24720
Performance impact of -no-pie

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Package: emacs;

Reported by: Paul Eggert <eggert <at> cs.ucla.edu>

Date: Mon, 17 Oct 2016 20:20:02 UTC

Severity: normal

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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Message #8 received at 24720 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Alex <agrambot <at> gmail.com>
Cc: 24720 <at> debbugs.gnu.org
Subject: Re: Performance impact of -no-pie
Date: Mon, 17 Oct 2016 13:26:32 -0700

> Is such a performance impact expected? If so, is there a plan to regain the old speed?

No, such a performance change is not expected.

Can you reproduce the problem with the emacs-25 or master branches, 
without manually adding -no-pie to CFLAGS? The bleeding-edge versions of 
Emacs attack the problem in a slightly different way, which might affect 
performance less.

If you still see a performance problem, can you narrow it down, e.g., by 
configuring it with --enable-profiling and seeing where the extra cycles 
are going?
This bug report was last modified 8 years and 207 days ago.

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