ETA and AdaptiveETA widgets

[Midnighter]

Hi, just wondering whether you are interested in changing the ETA and AdapativeETA widgets. At the moment their estimation is based on the mean processing time per item:

pbar.seconds_elapsed / pbar.currval

and

per_item = duration / items

respectively. However, the mean is very susceptible to outliers, i.e., a few tasks that took exceptionally long will lead to over estimation of the time needed, whereas a few very short tasks (due to handled exceptions, for example) will lead to gross underestimation of the ETA. I propose to use the median instead, which is statistically much more robust. If you're interested, I can look into making a pull request.

[wolph]

Definitely sounds interesting, although (for the sake of API stability) I would opt for either a new method or as a parameter of the ETA/AdaptiveETA methods.

If you'll make a pull request I'll definitely merge it :)

[wolph]

How do you like the current version? We could easily add a different calculation to it now :)