If you would like to estimate how long the Brute-force or Mask attack will take, or test APDFPR's speed on a particular document, use the benchmark feature. Just select all the desired options, then press the Benchmark button (next to Stop). The program will work for about 10 seconds, and display some statistics afterwards:
Here you can see the total number of passwords (according to the options you set), average program speed, and estimated time. Please note that real time might be slightly different, because the speed of the program depends on how many other applications are running at the same time.
