[wp-trac] [WordPress Trac] #32597: mediaelement.js high CPU usage triggered by the buffering CSS animation

WordPress Trac noreply at wordpress.org
Mon May 12 12:38:44 UTC 2025


#32597: mediaelement.js high CPU usage triggered by the buffering CSS animation
-------------------------------------------------+-------------------------
 Reporter:  afercia                              |       Owner:  afercia
     Type:  defect (bug)                         |      Status:  closed
 Priority:  low                                  |   Milestone:  Future
                                                 |  Release
Component:  External Libraries                   |     Version:
 Severity:  normal                               |  Resolution:  worksforme
 Keywords:  has-test-info has-screenshots has-   |     Focuses:
  patch                                          |
-------------------------------------------------+-------------------------
Changes (by SirLouen):

 * keywords:  has-test-info has-screenshots has-patch needs-testing => has-
     test-info has-screenshots has-patch
 * status:  assigned => closed
 * resolution:   => worksforme


Comment:

 == Bug Reproduction Report
 === Description
 Given how old is this report, I wanted to check with current builds of
 Firefox
 ❌ This report can't validate that  the issue can be reproduced.

 === Environment
 - WordPress: 6.9-alpha-60093-src
 - PHP: 8.4.6
 - Server: nginx/1.27.5
 - Database: mysqli (Server: 8.4.5 / Client: mysqlnd 8.4.6)
 - Browser: Chrome 136.0.0.0
 - OS: Windows 10/11
 - Theme: Twenty Twenty 2.9
 - MU Plugins: None activated
 - Plugins:
   * Classic Editor 1.6.7
   * Test Reports 1.2.0

 === Bug Reproduction Steps
 1. Followed steps [https://core.trac.wordpress.org/ticket/32597#comment:8
 provided here] (check for minor typo in `mejs-time-buffering`
 2. Tested with both Chrome 126 and Firefox 13

 === Additional notes
 Probably this has been fixed at some point by a library or update in code.
 Maybe as @stoyangeorgiev suggested, the latest version of `medialements`
 has sorted this problem. Time to close this ticket. Reopen if anyone has
 further steps to reproduce this.

 === Actual Results
 1. ❌ Error condition doesn't occur. CPU Remains stable.

 === Supplemental Artifacts
 Screenshot with results:
 [[Image(https://i.imgur.com/GDPW4iI.png)]]

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/32597#comment:22>
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