Version 4 supported
This version of Silverstripe CMS is still supported though will not receive any additional features. Go to documentation for the most recent stable version.
Profiling is the best way to identify bottle necks and other slow moving parts of your application prime for optimization.
Silverstripe CMS does not include any profiling tools out of the box, but we recommend the use of existing tools such as XHProf and XDebug.