Depends on the bits they don't do. I get contributions from time to time. Yet can look small , but I need to add tests, documentation, and so on. It can easily

Depends on the bits they don't do. I get contributions from time to time. Yet can look small , but I need to add tests, documentation, and so on. It can easily take an hour for just one method added, or whatever. If the code is just fire and forget, then fine. If it's part of a bigger system with rigorous standards then 300 lines can take a day or more to "merge" in.