When your site comes under heavy load it is useful to be able to temporarily disable particular plugins or remove page elements to save bandwidth & server load. It can make the difference between your site going down quickly or continuing to serve visitors.
This ability is currently provided by Drupal & other CMS systems.
Throttle is an implementation of a WordPress Throttle as a plugin, providing an API for developers to control their own plugins and a configurable interface for bloggers.
Please support getting this functionality from a plugin into WordPress core so all sites and plugin developers can make use of it more effectively.