recording:
1. There is no need to combine the lower data link, QPS should be less than 10ms, no more than 20ms.
2. Call link is not refers to the service call hierarchy, but rather refers to the level API interfaces!
3. The length is very important when a call to the user experience, but they can not avoid the problem of external data, so there is no need to lower the link actually possible to optimize their long response time
Link problem everyone knows, but no pictures, the experience is not clear.
Remember once seeing a time-consuming request a few seconds long chain caused.