For an exponential process it takes roughly the same amount of time to go from 10 to 100 as it does to go from 100,000 to 1M, 10M to 100M, et cetera. So if you

For an exponential process it takes roughly the same amount of time to go from 10 to 100 as it does to go from 100,000 to 1M, 10M to 100M, et cetera. So if you had a progress bar of an exponential progress, you'd want the % to be of the log, not the absolute number. Because even if you were at 100M/1B, in terms of time you would not be 10%, but rather 90%. Of course, this situation is dynamic, and there are more variables at play, but a baseline for thought for progress bar of exponential processes is to do log of the numbers.