address review comment

Author: igalshilman

src/connection/buffered_connection.ts

@@ -15,6 +15,8 @@ export class BufferedConnection implements Connection {
       // BUT we must wait for the previous flush to end.
       this.flushing = this.flushing.then(() => this.scheduleFlush());
     }
+    // we don't need to reschedule the `flush` here,
+    // because the flush happens anyway at the end of the current event loop iteration.
     // tag along to the previously scheduled flush.
     return this.flushing;
   }