vhr-bench is a free, open-source command-line tool that measures what a Linux VPS actually delivers: processor throughput and memory bandwidth via sysbench, and random 4k read/write IOPS via fio. It is a single readable Bash script. It prints the exact JSON it will send and asks for your confirmation before anything leaves your server. It never collects your hostname, IP, files, or credentials. Upload a result to compare your box against real ones from other people's servers.