javascript - Data reception is slow. Is it an interface problem? Is this mainly a front-end optimization or a background optimization?

Question

These interfaces are very slow to receive. Is loading other things blocking the loading or there is a problem with the interface provided by the background itself?

Answer 1

Click up and place the mouse on each bar:

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Answer 2

Backend, it took 20 seconds to receive. Either the network is not good, or the background processing is slow. I think the latter depends on the backend. The former can be interface merging and optimization, or delaying requests or caching requests