(Statnperf is a small tool that can display network traffic in a graphical + textual floating window. Statnperf software features are: 1. It can calculate the traffic by manual timing, and it is best to measure the connection speed of a specific website; 2. It can comprehensively count the flow of the current day and the current month, provide the flow forecast of the current month, and set the reminder of monthly flow and monthly forecast flow. It is especially suitable for netizens who charge by traffic.)