How to tell whether I'm a 1/10x developer or not? Often it took me 3 months just to get a asp.net web application, as I'm unable to cope with the frequent requirement changes.
I was wondering just the same thing. I can build features and ship code, but I'm definitely slower than my co-worker (who has been on the project for over 1 year, while I'm just in my first 3 months).
How can we measure where we fit on the scale?
A lot of the productivity difference is probably due to overall familiarity with the code base. In a year from now when you have to fix a bug or add a feature you will probably know where to go and have an idea of what needs to be done rather than having to go hunting for it or asking another developer. If a project is started from scratch I imagine a lot of difference in productivity is due to familiarity with the tools, frameworks, api's, etc. used.
Make an estimate when you start a task. If it takes you 10x the time you probably are.