Small library for showing how much time every test took to run.
$ composer require santik/phpunit-profiler
Add following lines in your phpunit.xml file.
<listeners>
...
<listener class="ProfilingTestListener" file="PATH_TO_DIRECTORY_WITH_LIBRARY/ProfilingTestListener.php">
<arguments>
<double>0.015</double><!--seconds-->
<double>0.001</double><!--seconds-->
</arguments>
</listener>
....
</listeners>