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bug#28625: [PROPOSED] Speed up (format "%s" STRING) and the like

From: Paul Eggert
Subject: bug#28625: [PROPOSED] Speed up (format "%s" STRING) and the like
Date: Wed, 27 Sep 2017 16:33:24 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0

On 09/27/2017 02:33 PM, John Wiegley wrote:
Can you enable ELP for just 'format', use Emacs for a few hours as you
normally do, and then report how many times, and how much time, is consumed in
its use?

I am not the best person to try that, as I typically don't use Emacs for hours at a time and am not really a power user in the traditional sense. Furthermore, counting all calls isn't what is wanted here: we want to count just calls that copy strings unnecessarily.

I take your point that the patch is only a minor performance improvement in the big picture. And although the patch does simplify the Emacs source code, that's minor too. (Should I propose only major changes from now on? :-)

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