Performance issues

[poVoq]

No doubt performance isn't great on the Nexus5 and similar devices, although the recent qtwebengine upgrade helped. Maybe the ubports upgrade to qt5.12 might improve things further.

On ConverseJS there isn't that much further improvements possible, but the upcoming new 7.0 version might help here and there.

I previously tried switching to IndexDB for browser storage, but that was really slow.

But I was recently told (memory footprint halfed) that the generally good performance of localStorage could be further improved with this:
https://github.com/esphen/localforage-webExtensionStorage-driver

Might be worth a try.

Edit: could be that this only works in a browser extension.