Skip to content
Branch: master
Go to file

Latest commit


Failed to load latest commit information.
Latest commit message
Commit time

Query Monitor Flamegraph
This Query Monitor extension will add profiling framegraphs to Query Monitor via the xhprof PHP extension.
A Human Made project. Maintained by @joehoyle.

Install Instructions

  1. Have the Query Monitor plugin installed and activated.
  2. Have the xhprof PHP extension installed.
  3. Install this plugin :)
  4. Add a call to xhprof_sample_enable(); to your wp-config.php

Versions of XHProf

Unfortunately XHProf is not actively maintained and has some shortcomings. Flamegraph makes use of the xhprof_sample_enable() function which by is hardcoded to 100ms intervals with the official XHProf extension. There's several forks and updates to XHProf, refer to the table below:

Project Compatible Notes
XHProf Official yes Note: Doesn't support PHP 7. Is restricted to 100ms interval sampling, making it useless for the most part.
XHProf with configurable sampling yes Note: Doesn't support PHP 7. Best solution! However, you'll need to build from source.
Tideways no Tideways is an XHProf fork, however doesn't support *_sample_enabled. See
XHProf PHP7 fork no Doesn't support xhprof_sample_enabled

If you know of any other XHProf forks or compatible output libraries, be sure to let me know!


Flamegraphs for Query Monitor



No releases published
You can’t perform that action at this time.