message: Improve addEventsToTimeline performance scoping WhoIsTypingTile::setState
diff: @@ -87,7 +87,9 @@ export default class WhoIsTypingTile extends React.Component {
  const userId = event.getSender();
  // remove user from usersTyping
  const usersTyping = this.state.usersTyping.filter((m) => m.userId !== userId);
  + if (usersTyping.length !== this.state.usersTyping.length) {
  this.setState({usersTyping});
  + }
  // abort timer if any
  this._abortUserTimer(userId);
  }
  