Improve the real or perceived speed of the site, or monitor performance metrics.
Shift queue is extended from Drupal system queue with two new features:
Required by Braintree Integration module.
LoaderIO module provides Drupal users a way to test their website for performance.
Tiny module that lets you filter watchdog entries for given backends, based on type and/or severity.
This is the Varnish purger for the Purge module.