I assume you have this change worked up locally? I won't work up a PR. LMK otherwise.

WeAreAllSatoshi

Yes, I think so, too. Those could only be set when there is a `@` mention query found, not just every change. We only need them to be accurate in that case.

 on every change. These object literals each have a new reference and trigger a rerender even if the object is functionally identical.

Stacker Saloon

saloon

I suspect if might be enough to not `setUserDropdownStyle` and `setMentionIndices` on every change. These object literals each have a new reference and trigger a rerender even if the object is functionally identical.