Once a code base reaches a million lines of code it gets difficult to keep it all in your head, and even if the software has a nice architecture with module patterns or what not, just the sheer amount of different methods and functions will slow you down. Sure autocomplete will help, but the best productivity solution afaik is to keep the code base small :P
> A kernel developer usually contributes both code and documentation to the Linux kernel. As kernel developers become experts in their particular subsystem, they contribute to patch review on the subsystem mailing list. Eventually, they may become the maintainer of a particular driver.
This sounds good to me. I'm not qualified to judge the quality of the linux kernel, but judging by the adoption, many features, and hardware support, they must do something right.
