Ask HN: How do you measure your software dev productivity?

As a software developer, when you create tools to play around with data, in one form or the other, it does become important to measure one's own productivity.

There are several tools as rescuetime, harvestapp etc. that tell you how much time you wasted/utilized doing what, but then if your code editor is open they say the time was productive.

Your code editor being the main window, is by no means a measure of the productivity. Couple of parameters that I have thought are -

1. No. of lines of code that you write.

2. No. of features that you have implemented.

3. No. of bugs that you have solved.

4. And the list can go on.

But each of the above are pretty subjective terms, and are not a good measure.

Just curious how people measure their software development efficiency.

Thanks for reading it.