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Porting a Python PEG parser to Rust in 72 hours, and actually proving it worked

There's a joke that every Rust project starts with someone saying "we should rewrite this in Rust" and ends four weekends later with a half-finished repo and a lot of new opinions about lifetimes.

  • Team ported parsimonious Python PEG parser to Rust in 72 hours for Port Mortem 2026 hackathon
  • Rust parser achieved 23x performance increase over original Python parser
  • Optimized Rust parser used 6.7 MB memory vs. 13 MB, with 0.016 ms peak latency

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