a tar or a zip?
Archives based on the tar file format follow the
more modern USTAR file format. The design of the tar file header
makes them more efficient to access than the zip file format, and
almost as efficient as the phar file format. File names are limited
to 255 bytes, including full path within the phar archive. There is
no limit on the number of files within a tar-based phar archive.
These archives can fully compressed in gzip or bzip2 format and
still be executed by the Phar extension.