We drove 247 matching engines through one C ABI harness on one identical workload: every open-source FIFO implementation we could find, deduplicated, and our own, on the same gate. The workload doubles as a byte-identical correctness oracle, 1,000,000,000+ order messages per engine, replayed against an independent-engine consensus. Only 47 are correct as shipped; we filed 181 GitHub issues upstream, 28 already fixed by their maintainers, none declined. Our engine leads the 160 that reproduce the consensus by ~95 M/s (12.6x the second best) on worst-case throughput. One core sustains 103.4 million order messages per second (122.09 million on AMD EPYC processors) worst-case, and in the engine's production configuration its wire pipeline keeps single-book P99 host-path latency, OUCH parsing and OUCH/ITCH encoding included, under a microsecond through 82 M msgs/s; a 96-core server (~$1,630/month, 3-year reserved) reaches ~1.3 billion/s across over 10,000 symbols, for scale, over 45x the CTA consolidated quote feed's provisioned capacity. The lead is structural: the 73 engines written inside the trading industry sit under the same 8.19 M/s ceiling as the rest of the field, and it is one of them that sets it.

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