Re: Reliable after-change-functions (via: Using incremental parsing in Emacs)

[Dmitry Gutov]

On 01.04.2020 16:52, Alan Mackenzie wrote:
> This doesn't seem to affect starting up performance that badly.  On my
> machine (a 3 yo AMD Ryzen) visiting xdisp.c (including the fontification
> of the first screenful of comments) is taking 0.18s.

Interesting. How do you measure it exactly? Do you kill the buffer 
between tries?

I have a fast Intel CPU that is barely 2 years old (i9-8950HK), 
system-configuration-options is "--with-x-toolkit=gtk3 'CFLAGS=-Og 
-g3'", the build is from emacs-27 branch, recent revision.

With 'emacs -Q' it's a little faster, but still

  (benchmark 1 '(progn (find-file "src/xdisp.c")))

prints out

  Elapsed time: 0.968598s (0.144805s in 8 GCs)