Replay: Disable session replay if recording affects performance too greatly

[bruno-garcia]

We'll attempt to detect Session Replay recording overhead to gracefully downgrade Sentry off of Replay, into Errors and Performance monitoring only (or whatever is configured).

This should address:

• Sentry Replay freezes pages with a large DOM tree #7085
• Replay is making my Angular app super slow #6946

[Ejdems666]

Hello, we are experiencing similar issue as #6946 for 1 specific form in our angular app. Because of that we had to disable the replays. This would enable us to use them again. When do you plan to release this?

[billyvg]

@Ejdems666 We should have a release by next week, you can keep an eye on #8228 -- I'll be updating docs to reflect on some options while we work on better native solutions, but here are some things you can currently do:

• you can use the block feature to block the form. This will prevent the mutations inside of that form from being recorded
• when the mutationLimit PR above is released, it will record replay breadcrumbs when we detect > 750 mutations. The breadcrumbs will give you a specific number. You can use this to adjust the mutationLimit configuration option (which is set at a pretty high default currently of 10,000).

Also if your app is publicly accessible, it'd help me identify additional causes of perf regressions. Feel free to drop me a link if you're interested (billy at sentry.io) - thanks!

[Ejdems666]

@billyvg Thank you very much for this quick fix.
We'll test this in the upcoming weeks.
Unfortunatelly our app is not publicly accessible, hopefully further debugging won't be necessary.