CSS optimization in Drupal is accomplished through two steps—aggregation and compression. This optimization provides a significant boost to performance both on the server as well as for the user. This recipe details the steps to be performed to enable this feature in Drupal.
CSS optimization is a requirement only when a site is ready to go live. Until such time, it is recommended that it be left switched off as CSS changes during development will not take effect unless the Drupal cache is cleared.
Optimization and other performance-related features are sequestered within
| Administer | Site configuration | Performance). This performance configuration page should ...