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The trick to producing high quality software is always incremental development. You can't build something huge all at once, by the time you find out what your mistakes were you've already got too much complexity and crap built around them to really fix them.

You have to start out small, get something minimal and basic not just working but robust enough that you understand it, rewriting it as many times as it takes to get it right. Then you add the next feature or enhancement, and then the next, all the while rewriting shit when you discover your understanding some part of the system was flawed.

The reason filesystems are hard is because they're hard to develop incrementally - you need a huge number of different moving parts before you have a real filesystem. And no one wants a toy filesystem, there's huge pressure to get something really sophisticated done quickly because anything less is going to be uninteresting compared to what we have now.

That's really most of it, if you want to produce high quality code you have to resist the urge to go too quickly and you have to go back and fix your mistakes as soon as you find them, even when it's not very fun.




I think "rewriting shit" may be one of the leading causes of recurring bugs...




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