Sebastian Bergmann has posted about a bottle neck in the PHPUnit unit testing software for PHP:

Now that collecting code coverage information is not slow anymore (as of Xdebug 2.0.1), PHPUnit's report generation code (PHPUnit_Util_Report_*) has become a bottleneck.

There are several images included in the post (output of KCachegrind):

• generation at revision 1473
• generation at revision 1475
• generation at 1486
• generation at 1488