On 12.02.21 20:31, Paul Gilmartin via tz wrote:

I notice, FWIW, that the MacOS distribution (at Mojave) contains no
symlinks; the files are entirely replicated.  This needlessly expands
the DB by about 30% (MacOS nicely supports symlinks) and actually
removes information.  The casual browser can not tell at a glance that
files are duplicated.

Nobody should worry about these 30%, I think, these days.

A lot more of space is wasted, everywhere.

On my Mac (Catalina) I find at least three full copies of tzdb
ls -l /var/db/timezone/tz
drwxr-xr-x 5 root wheel 160 27 Okt 03:33 2020d.1.0
drwxr-xr-x 5 root wheel 160 31 Jan 04:26 2020f.1.0
drwxr-xr-x 5 root wheel 160 2 Feb 04:27 2021a.1.0