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> I wonder if, for instance, optimizing for speed may produce code that is faster but harder to understand and extend.

Superoptimizers have been around since 1987: https://en.wikipedia.org/wiki/Superoptimization

They generate fast code that is not meant to be understood or extended.



But there output is (usually) executable code, and is not committed in a VCS. So the source code is still readable.

When people use LLMs to improve their code, they commit their output to Git to be used as source code.


...hmm, at some point we'll need to find a new place to draw the boundaries, won't we?

Until ~2022 there was a clear line between human-generated code and computer-generated code. The former was generally optimized for readability and the latter was optimized for speed at all cost.

Now we have computer-generated code in the human layer and it's not obvious what it should be optimized for.


> it's not obvious what it should be optimized for

It should be optimized for readability by AI. If a human wants to know what a given bit of code does, they can just ask.




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