message: Apply a throttle to filter condition updates
diff: @@ -18,6 +18,7 @@ import { Room } from "matrix-js-sdk/src/models/room";
  import { FILTER_CHANGED, FilterPriority, IFilterCondition } from "./IFilterCondition";
  import { EventEmitter } from "events";
  import { removeHiddenChars } from "matrix-js-sdk/src/utils";
  +import { throttle } from "lodash";
  /**
  * A filter condition for the room list which reveals rooms of a particular
  @@ -41,9 +42,13 @@ export class NameFilterCondition extends EventEmitter implements IFilterConditio
  public set search(val: string) {
  this._search = val;
  - this.emit(FILTER_CHANGED);
  + this.callUpdate();
  }
  + private callUpdate = throttle(() => {
  + this.emit(FILTER_CHANGED);
  + }, 200, {trailing: true, leading: true});
  +
  public isVisible(room: Room): boolean {
  const lcFilter = this.search.toLowerCase();
  if (this.search[0] === '#') {
  