23.11 Accessing Compressed Files
Emacs automatically uncompresses compressed files when you visit
them, and automatically recompresses them if you alter them and save
them. Emacs recognizes compressed files by their file names. File
names ending in ‘.gz’ indicate a file compressed with
gzip. Other endings indicate other compression programs.
Automatic uncompression and compression apply to all the operations in
which Emacs uses the contents of a file. This includes visiting it,
saving it, inserting its contents into a buffer, loading it, and byte
compiling it.
To disable this feature, type the command M-x
auto-compression-mode. You can disenable it permanently by
customizing the variable auto-compression-mode.
