Hello,
P3 is compatible with WordPress up to and including 3.9. I have been avoiding releasing a new version just to update the readme file.
You can see user submitted plugin compatibility information on the P3 page on the lower right-hand side. 3.9 is currently marked as 4 “yes” and 0 “no”
There’s an update pending you’re welcome to try here:
http://downloads.wp.xz.cn/plugin/p3-profiler.zip
It will be 1.5.0 and it’s pending some more thorough testing on different hosts, web servers, versions of php, etc.
You’re welcome to browse the changes since 1.4.1 here:
https://plugins.trac.ww.wp.xz.cn/changeset?sfp_email=&sfph_mail=&reponame=&new=905828%40p3-profiler&old=635099%40p3-profiler&sfp_email=&sfph_mail=
Please let me know if you have any questions or if you find any features that do not work.
Thanks. That’s all I need to know.