AVSMeter is a command-line tool designed to measures the speed and efficiency of Avisynth scripts and to check if the plugin subsystem is set up and working correctly.

Users familiar with the DOS prompt can use the following switches:

-avsinfo Display extended Avisynth info
-info [-i] Display clip info
-log [-l] Create log file
-csv Create csv file
-gpu Display GPU/VPU usage (requires GPU-Z)
-range=first,last Set frame range
-timelimit=n Set time limit (seconds)
-priority=n Set process priority (1:low, 2:normal, 3:high)

For more detailed information on each switch, visit the Author's link above.