Motivations
Test model capabilities
Make a fast TypeScript type checker
Make a ts checker that can work in WASM with high performance
MemesIts the equivalent of telling individual people they are the problem when it comes to leaving their living room lights on when not in the room or they don't recycle all their stuff correctly when companies/corporations have orders of magnitude more waste.
In the same way you trust any build of the official compiler: it passes all of the existing tests.
An LLM has reimplemented a 2 times faster version of a program developed by a team of dozens of brilliant engineers led by few of the biggest experts in compilers and programming languages in the world.
While maintaining 100% test coverage and so far compiling every single project that the original compiler did.
If your takeaway here is "yeah, but the other one has been checked by dozens of paid devs and an entire community", and still those dozens of devs with the backing of thousands of contributors could not make a compiler faster I can't buy say: "maybe we humans aren't as good as writing code as we thought and LLMs are exposing us".