bug#37393: 26.2.90; [PATCH] Speed up 'csv-align-fields'

[Eli Zaretskii]

> From: Simen Heggestøyl <simenheg@gmail.com>
> Cc: eliz@gnu.org, 37393@debbugs.gnu.org, sdl.web@gmail.com
> Date: Thu, 19 Sep 2019 17:51:33 +0200
> 
> By using the pixel X divided by (frame-char-width), the results look
> right, but I'm getting a slowdown on a 400 line file from 0.03s to 2s.

Then I guess this technique won't help in your case.  Sorry for
distracting you.