• New -c option on table and tree subcommands allows you to rank authors by first modified time.
• Caching feature: parsed commits are now cached on disk so diffs only have to be computed once. This caching is done on a per-repository basis. Subsequent runs of git who on the same repo will be much faster as a result. Caching can be disabled using the GIT_WHO_DISABLE_CACHE env var (set it to 1 ).
• Non-English names are better supported in the table output from the table subcommand.