Thanks for this!  Just did a cohort of 15K and it worked fine. I unintentionally hit the "back" button, but after clicking "forward" and my cohort was validated, not even 10 seconds later. 

Also, I can't seem to find the place that listed which users were not valid. Did we lose that ability?

- E

On Thu, Nov 21, 2013 at 3:16 PM, Dan Andreescu <dandreescu@wikimedia.org> wrote:

On Thu, Nov 21, 2013 at 6:00 PM, Dario Taraborelli <dtaraborelli@wikimedia.org> wrote:

fantastic, is there any chance we could get an even better performance if we allowed users to specify the field type in the upload form (if it’s just user_ids, validation will be faster and the app doesn’t need to check every single entry for a valid user_name too). I understand that by design the application makes no assumption about the type of that field (and in fact it accepts a mix of user_id’s and user_names, correct)?

absolutely, it would run up to 2x faster if the file was all user_ids and the user specified that up front.  But currently, yes, you can mix user_ids and user_names 

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