How long did it take me to complete this question?

A feature that I have not seen and wish to be is time capture. After completing a practice problem, it would be nice to see how long it took to complete that problem. Mini timed tests are helpful, however, it does little to emphasize which problem took the longest or was completed the fastest. Therefore, after every problem, if there was a way to see exactly how long it took for us to finish that particular problem, it would be very helpful, considering that the SAT and PSAT are timed:) Thank you!