[Enhancement] Group Performance

[nplasterer]

Performance pass for large, small, medium groups

Large 400

• Sending message is instant
• Loading and scrolling messages is fast
• Adding/Removing members is instant
• Updating metadata works

Medium 250

• Sending message is instant
• Loading and scrolling messages is fast
• Adding/Removing members is instant
• Updating metadata works

Small 30

• Sending message is instant
• Loading and scrolling messages is fast
• Adding/Removing members is instant
• Updating metadata works

[nplasterer]

We should be able to use xmtp_debug to test these cases

https://github.com/xmtp/libxmtp/tree/main/xmtp_debug

[thierryskoda]

For instant UX, I would use react-query by just updating the query cache onMutate. Some WIP in use-send-message.ts

[thierryskoda]

And for the speed of scrolling etc I wanted to use https://github.com/LegendApp/legend-list

Was just waiting for it to be a little more stable