PTProfiler is a nice profiling tool. It profiles Page Templates and TALES expressions.
As it runs in "client" space, it is very useful to start research of which part of customizations/add-on is slowing down our Plone setups.
If you have never used it, I encourage you to take some time to try it and add it to your toolbox.
PTProfiler 1.4 was not compatible with Zope 2.12 and 2.13.
I have released Products.PTProfiler 1.5. This new release is compatible with Zope 12 and 13 thanks to the work of Radim Novotný.
I have added some basic tests and setup TravisCI to make it easier to keep the tool working with further Zope releases.
Enjoy !