ShrimpTest plugin for WP Super Cache / W3 Total Cache
To enable ShrimpTest support for WP Super Cache, place this plugin file in
wp-content/plugins/wp-super-cache/plugins
Once installed, you must switch your WP Super Cache settings to "half on" mode. Then make sure that it says "ShrimpTest support is enabled" at the bottom of the WP Super Cache Manager page.
To enable ShrimpTest support for W3 Total Cache, place this plugin file in
wp-content/plugins/w3-total-cache/plugins
Once installed, you must switch your W3 Total Cache Page Cache setting to use the "Disk (basic)" method. "Disk (enhanced)" is not supported at this time.