Degraded performance in Mixpanel session replay from version 2.63.0

[phthhieu]

Description

We experienced with degraded performance when using Mixpanel session replay along with some specific browser extension such as: Grammarly (This extension is common from our end).

We started to see the issue a few weeks ago, with several testings, we found our website performance is good at 2.62.0, but started to be slow from 2.63.0 712f965, and latest version 2.64.0.

We investigated, the cause possibly is from rrweb-io/rrweb#1603 which is potentially fixed in the next release of rrweb rrweb-io/rrweb#1605.

Proposed solution

As rrweb hasn't released a patch, I created this issue to raise awareness, we may need to upgrade rrweb when it is ready.