If you’re having trouble on any RPC (node) on DeFi networks, you can try alternative URL’s. This can happen when chains have lots of activity and a node gets overloaded - we usually call this congestion.
Here is a proper speedtest tool for RPC’s powered by Eden Network.
ChainList also shows the latency to the most common RPCs.
CoinTool has multiple RPC links by default and includes information about the current ping (ms) to each server. Lower is better.
Binance Smart Chain slow?
For BSC 
specific nodes, you can also visit this website.
