A few months ago, I had to quickly bang out a script to output about 20 million lines of text, each the output of a hash function. My naive solution took more t

A few months ago, I had to quickly bang out a script to output about 20 million lines of text, each the output of a hash function. My naive solution took more than a few minutes - simple optimizations such as writing every 10k lines cut the time significantly. Threading would have helped quite a bit as well.