The compact version of Paloose is identical with the full version except that it lacks comments and logging. This speeds up the server response considerably and should be used when performance is required. The latest compact version can be found here.
Please see the VERSIONS file that is bundled with the Paloose download for details of older versions. The compact version is suffixed with "-c" in the version number but otherwise follows the same version scheme. See the main downloads page for version information