| Horde_Compress_Fast | Provides fast compression of strings using the best-available algorithm. |
| Horde_Compress_Fast_Base | Abstract base driver class for fast compression. |
| Horde_Compress_Fast_Exception | Exception object for the Horde_Compress_Fast package. |
| Horde_Compress_Fast_Lz4 | The lz4 driver uses the horde_lz4 extension for compression. |
| Horde_Compress_Fast_Lzf | The lzf driver uses the lzf PECL module for compression. |
| Horde_Compress_Fast_Null | The null driver does no compression/decompression on a string. |
| Horde_Compress_Fast_Zlib | Supports using the zlib extension for compression. |