Using XHProf to evaluate code performance
XHProf is a hierarchical profiler for PHP. Using XHProf, you can evaluate your website's code performance and identify functions that may be running slowly or using an excessive portion of your server resources. On Acquia Cloud, you should use XHProf only on your Dev and Stage environments. Be sure to disable XHProf when you're not actively evaluating your website, because the tool uses additional server resources and can adversely affect your site's performance.
For more information about XHProf, see: