Subject: bug#31853: 27.0.50; binding case-fold-search is slow when there are many buffers

From: Eli Zaretskii <[email-masked]>
Date: Sat, 16 Jun 2018 09:51:53 +0300

[Please don't change the Subject in significant ways.]

> From: Aaron Jensen <[email-masked]>
> Date: Fri, 15 Jun 2018 19:10:08 -0700
> 
> This is apparently the second time I've spent time tracking down perf
> issues that have led to this same issue:
> 
> https://debbugs.gnu.org/cgi/bugreport.cgi?bug=23928
> 
> Is it possible to improve this somehow?

We don't yet understand what is there to improve.  Please follow up on
the suggestions elsewhere in this thread to collect more data about
the reason(s) for the slow let-binding in your case.