Since the manpages are generated at build time, and gzip by
default includes the file timestamp in the compressed file,
this 'leaks' the build time into the resulting artifact.
There are many advantages to avoiding 'leaking' the build time
into the artifact: it can make detecting compromised CI servers
easier through https://reproducible-builds.org/ , can make
content-addressed storage more effective and improve cache hits
when rebuilding.
Since the manpages are generated at build time, and gzip by default includes the file timestamp in the compressed file, this 'leaks' the build time into the resulting artifact.
There are many advantages to avoiding 'leaking' the build time into the artifact: it can make detecting compromised CI servers easier through https://reproducible-builds.org/ , can make content-addressed storage more effective and improve cache hits when rebuilding.