Excimer

Excimer is a PHP 7.1+ extension that provides a non-static, non-global profiler for PHP. It is intended as a replacement for Xhprof. More details can be found at T205059 (TODO: Move that design documentation here).

Installation
Download the source code into an appropriate directory from git:

Or and unpack.

Build
here is the directory that excimer git repository was cloned to.

Then add  to the PHP configuration in an appropriate place. For example, in modern Debian-derived distributions you'd add a file to  (where   is the version of PHP for which you compiled Excimer) and use the   command to enable it.