Title: QM causing high CPU% when devtools open
Last modified: November 7, 2022

---

# QM causing high CPU% when devtools open

 *  Resolved [johnny538](https://wordpress.org/support/users/johnny538/)
 * (@johnny538)
 * [3 years, 7 months ago](https://wordpress.org/support/topic/qm-causing-high-cpu-when-devtools-open/)
 * Hi,
 * On multiple sites, and using multiple browsers (Google Chrome, Firefox, MS Edge),
   I get a very high CPU% usage while developer tools open, and I believe it’s because
   devtools keeps checking for site issues when I refresh, and it’s finding hundreds
   of issues with the markup that’s added to a page by QM, for example
    -  tags that have no direct
    -  descendants. Whenever I deactivate QM, I have no more issues.
    - Every time I refresh a page while devtools is open, my CPU % spikes, and my
      fans ramp up. It takes a few minutes before devtools is done checking for 
      issues and then the CPU% goes down again, but while working on a site I of
      course refresh pages a lot!
    - Could you please look into this?

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [John Blackbourn](https://wordpress.org/support/users/johnbillion/)
 * (@johnbillion)
 * WordPress Core Developer
 * [3 years, 7 months ago](https://wordpress.org/support/topic/qm-causing-high-cpu-when-devtools-open/#post-16175038)
 * To be honest that’s not something that I can fix in QM (at least not at the moment).
   I don’t believe that’s default functionality of the dev tools so if that’s an
   automated scan that’s happening I suggest you disable it from running automatically
   or only run it when QM isn’t active.
 *  Thread Starter [johnny538](https://wordpress.org/support/users/johnny538/)
 * (@johnny538)
 * [3 years, 7 months ago](https://wordpress.org/support/topic/qm-causing-high-cpu-when-devtools-open/#post-16186835)
 * Are you able to reproduce it at all?
 * It’s a default feature. Here’s a screenshot of what I mean if I wasn’t clear.
   This is on a vanilla Chromium instance on Manjaro Linux.
 * > [View post on imgur.com](https://imgur.com/qy6Ps74)
 * In this case there’s 1 issue reported. But when I work and have QM enabled, I’m
   getting hundreds of issues and the browser won’t stop until it’s done checking.
 * So far I haven’t been able to find out how to disable this, but I’ll do some 
   digging.
 * Let me know if I can help with debugging.

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘QM causing high CPU% when devtools open’ is closed to new replies.

 * ![](https://ps.w.org/query-monitor/assets/icon.svg?rev=2994095)
 * [Query Monitor](https://wordpress.org/plugins/query-monitor/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/query-monitor/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/query-monitor/)
 * [Active Topics](https://wordpress.org/support/plugin/query-monitor/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/query-monitor/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/query-monitor/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [johnny538](https://wordpress.org/support/users/johnny538/)
 * Last activity: [3 years, 7 months ago](https://wordpress.org/support/topic/qm-causing-high-cpu-when-devtools-open/#post-16186835)
 * Status: resolved