## download
curl -o /dev/null https://speed.cloudflare.com/__down?bytes=524288000
wget -O /dev/null https://github.com/fdxx/testfile/releases/download/v0.1/testfile


## upload
head --bytes 300M /dev/urandom | curl -o /dev/null https://speed.cloudflare.com/__up -d @-
curl -o /dev/null -X POST -T - https://speed.cloudflare.com/__up < /dev/urandom