Re: Opening multiple files in a single buffer?

[Gregory Heytings]

> Wonder how fast it would work with emacs src directory by opening all .h 
> anc .c files, some of which are 5k+ lines of code. If that is the case 
> for refactorisation and similar.

I just tried this.  With "cat *.h *.c > all.c" in the Emacs src directory, 
the resulting file is 11 MB, for about 370K source lines.  Opening and 
using that file, with c-mode, font-lock-mode, transient-mark-mode, 
hl-line-mode and display-line-numbers-mode (and a few others), works 
without any visible problems.  I tried e.g. to insert some code at random 
places, to kill the second half ot the buffer and to yank it as its first 
part, to query-replace-regexp the 1652 occurrences of "E\([^ ]*\)s " with 
"Es\1 ", to narrow-to-region/widen, ...  The Emacs process did not use 
more than 120 MB.

Gregory