How much time on average did you spend on each competition? Did that time increase or decrease (or was not affected?) as you progressed in skill?
Also what was your background before starting to compete?
Also what was your background before starting to compete?
Time to create the first submission dropped drastically after a few competitions. I now have a small library of munging and ensembling scripts that I can quickly adapt to suit the needs. On the other hand, time spend on optimizing and staying inside top 10, increased too. For the KDD-cup I'ddo weekend long sprints for a few measly improvements. All in all I'd say I spend at least 8 hours per competition.
My background was front-end developer growing into analytics and dataviz more and more. I think it was on HN that I saw a link to learnpythonthehardway.org and I started from there. After reading "programming collective intelligence" I got more serious.