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Porting vLLM's Serving Stack to C++20: A 66 MiB Binary Without Python

The C++20 port of vLLM results in a 66 MiB binary without Python dependencies, achieving comparable speeds at high concurrency.

The C++20 reimplementation of vLLM's serving stack produces a 66 MiB binary without Python dependencies. This port is used to verify the correctness of vLLM and offers comparable speeds at high concurrency.