First draft of the script was written in 6 days. Film was shot in 3 days. Editing was completed in 6 days (for the first early 65 min cut of the film).
Planned for 30 minutes takes minimum centered around a stage play like atmosphere that included heavy choreography. On the second day of shooting an adjustment was made to get more traditional "movie like" coverage of the script, putting more pressure on the already tight post production schedule.
On the second day of shooting production realized a mask was copyrighted and couldn't be used. This forced them to do re-shoots on the second day and get through 60 pages in one day as opposed to the schedule 30 a day they had planned for.
Including a second follow up shoot the whole film was shot in a combined total of 4 days.