src/vs/workbench/contrib/search/common/searchModel.ts/SearchModel/onSearchProgress
class SearchModel:	private async onSearchProgress(p: ISearchProgressItem) {
		if ((<IFileMatch>p).resource) {
			this._resultQueue.push(<IFileMatch>p);
			await this._startStreamDelay;
			if (this._resultQueue.length) {
				this._searchResult.add(this._resultQueue, true);
				this._resultQueue.length = 0;
			}
		}
	}