Rich Editor 100%CPU and >1GB memory usage

VF 3.1

A member at my forum just reported that while writing a post, he had to look up some info meanwhile, that took some time - he then experienced:

CPU usage maxed 100%

Memory usage of the browser exceeded 1GB

It then hung and he had to force close the browser.

He have experienced it several times.

A memory leak was mentioned fixed here

As I recall Rich Editor uses the browser much more.

Are there improvements related to this issue coming with the next release?

In other words should I wait out the next release before trying to figure out reproduction steps?


  • I dropped a 1071 words 6788 character text chunk in editor and left it for 1.5 hours while doing other stuff, 10 tabs open

    Browser memory usage exceeded 1gb(not surprised)

    CPU usage : 5-10%

    Issue not replicated.

  • The member replied that firefox is being used.

    Had him test with chrome - no issue.

    Related to firefox

  • Unfortunately in my forum the rich editor has been a hassle in terms of performance, and especially on mobile devices, many users have complained about the performance and many cannot edit their comments because they are reading infinitely.

  • charrondevcharrondev Developer Lead (PHP, JS) Montreal Vanilla Staff

    @Kaspar We've made quite a lot of performance improvements and bug fixes in the last 2 months to Rich Editor, and I don't 100% remember what made it into 3.1 and what didn't. We should have a 3.2 coming this week with a load of additional fixes. That release will be equivalent to the version we are running on this forum (

    If you can reproduce it on this site, it's definitely still an issue, and opening an issue w/ repro steps would be appreciated.

  • R_JR_J Cheerleader & Troubleshooter Munich Moderator

    I wrote a longer post and when the text becomes longer and also code formatting is involved, performance goes down. I will create an issue with a link to the comment

  • Hello,

    I had the same problem with Vanilla 3.1 (when Rich Editor is displayed), but here with Vanilla 3.2 the CPU charge is much better.

  •  Vanilla 3.2? is that an unreleased version @P3ter ?

  • charrondevcharrondev Developer Lead (PHP, JS) Montreal Vanilla Staff
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