How are other people doing?
I am the only full-time dev at our company and have written 500,000 lines of OCaml and F# code over the past 7 years, which equates to about 200 lines of code per day. However, the vast majority of that code is tutorial examples consisting of hundreds of separate projects each a few hundred lines long. Also, there is a lot of duplication between the OCaml and the F#. We are not maintaining any in-house code bases larger than 50kLOC.
In addition to developing and maintaining our own software, I have also consulted for many clients in industry over the past 7 years. For the first client, I wrote 2,000 lines of OCaml over 3 months which is 20 lines of code per day. For the next client, four of us wrote a compiler that generated millions of lines of C/C++/Python/Java/OCaml code as well as documentation in 6 months which is 2,000 lines of code per day per developer. For another client, I replaced 50kLOC of C++ with 6kLOC of F# in 6 months which is -352 lines of code per day. For yet another client, I am rewriting 15kLOC of OCaml in F# which will be the same size so 0 lines of code per day.
For our current client, I will replace 1,600,000 lines of C++ and Mathematica code with ~160kLOC of F# in 1 year (by writing a bespoke compiler) which will be -6,000 lines of code per day. This will be my most successful project to date and will save our client millions of dollars a year in on-going costs. I think everyone should aim to write -6,000 lines of code per day.
