WP Super Cache for Developers  WP Super Cache is a full page
caching plugin for WordPress that can dramatically speed up
blogs.  The plugin is very flexible and can be configured or
modified with the aid of filters, actions and the configuration
file to handle many situations.  The plugin operates in three
modes. Mod_rewrite, PHP and LEGACY. In the first two modes
static cache files are created in the supercache cache folder
(usually wp-content/cache/supercache/). No PHP is executed when
these files are served by Mod_rewrite. PHP mode serves the same
supercached files but loads a tiny amount of PHP code to do so
and is very quick. In LEGACY mode, the cache files are created
in the specified cache folder (usually wp-content/cache/) using
a filename created from an md5 of the current url, gzip encoding
status and the user’s cookies. The mobile user agent may also be
added if that’s switched on. The filename may finally be
filtered using the “wp_cache_key” filter as explained below.
The configuration file is W