when vultr buys a vps, and uses python3-m http.server to build a temporary server, when it is downloaded locally, the download speed in the first few seconds is basically 4 seconds. After tens of seconds, the download speed gradually slows down until there is no speed.

then I tried the same vultr vps, and the ping between two vps was less than 15ms, but one of them showed the same problem when downloading with wget, downloaded at high speed for a period of time, and then slowed down and got stuck.

is there anything that needs to be optimized in this situation?

ps:vps is 1 core 1G, but cpu is definitely not full.