FullFIX is an open-source C library for parsing FIX messages. FIX — the Financial Information Exchange protocol — is the messaging standard underneath global trading, and in that world every microsecond is a line item.
Why FIX parsing
It is a good stress test for an optimiser. The code is already written in C by people who cared about speed, the hot path is narrow and well understood, and correctness is non-negotiable: a parser that is faster but wrong is worse than useless. There is no easy headroom of the kind you find in hastily generated code.
The walkthrough
The demo takes the library as it ships, points Artemis at it, and walks through what the search finds on the hot path — with every candidate benchmarked and validated before it is kept. The workflow is the same one that applies to a Python service or a CUDA kernel; only the target changes.
