Here are some scripts to test your VPS performance
wget freevps.us/downloads/bench.sh -O – -o /dev/null | bash
How to Test VPS Download and Upload Speed
wget https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py
python speedtest.py –share
How to Test VPS Disk I/O Performance
dd if=/dev/zero of=test bs=64k count=16k conv=fdatasync