WebSocket API delays

Hi there! What are the typical delays when working with websocket API? I’m using amazon instance in ap-northeast-1 zone (the same as stream.binance.com/ws-api.binance.com use) and have websocket ping RTT ~2ms and time to receive response to order.place request ~4ms. It doesn’t look very fast for traffic inside single amazon zone. Also have tried several instance types: m6n.* performed a little bit better than t2.* winning about ~0.2-0.3ms. Has anyone managed to have significantly lower delays?