I have issue with curl and wget transfer speed on my new Raspberry Pi 4 1GB. Pi is sonnected to the router by ethernet cable. When I try to download for example a large test file or something from github transfer speed is around 30-40KB/s. It does not matter if the output is a file on sd card or /dev/null. When I run speedtest it shows 500Mbps and that is what my ISP offers.
When I try run the same curl/wget commands on my other RPi2b speed is maxed out for its 100Mbps ethernet.