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Use Nish Anil's DataTemplateSelector sample.
The more messages you send, the slower the performance. This appears to grow exponentially with list size.
Ass you add messages, each call to instantiate a new MessageViewModel gets progressively slower.
While this might stem from ListView.HasUnevenRows=true, that's what having the template selector is all about!
If this is a duplicate, can it be closed?
It was marked in error.
Created attachment 22953 [details]
Unfortunately, we’re unable to reproduce this report. If this issue is still occurring for you, please reopen this issue and attach a reproduction to the bug by starting with a clean Xamarin.Forms project adding just the code necessary to demonstrate the issue.
Here are some reproduction best practices: https://gist.github.com/jassmith/92405c300e54a01dcc6d
I have added my own test project against the latest versions and added a bunch of messages and didn't seem to have issues.