Writing code is limited by the pace of you being able to think up sound effective code.
I can't recall where I saw it but believe I heard a rule of thumb of only 40wpm pretty much mazing out most people's ability to write code.
Reference: The Internet
(For example: https://stackoverflow.com/questions/966800)
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Sure, code written (and rewritten) (and deleted) versus net output. But maybe be more thoughtful, do less than 40wpm, and write a better solution overall.
I think the point is 40wpm allows you to code. If you wrote at 10 lines per day, 80 char per line works out to 0.0333wpm.
You'll forget what you're doing by the time get a word out.
As in once you hit 40wpm you won't be slowed by your typing as you try to code.
(WPM is characters per minute over 5, i.e. assumes average word is 5 chars long).