Calculate Time Remaining

Question

What\'s a good algorithm for determining the remaining time for something to complete? I know how many total lines there are, and how many have completed already, how shoul

Answer 1

Generally, you know three things at any point in time while processing:

1. How many units/chunks/items have been processed up to that point in time (A).
2. How long it has taken to process those items (B).
3. The number of remaining items (C).

Given those items, the estimate (unless the time to process an item is constant) of the remaining time will be

B * C / A