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Microsoft agentically ports Copilot runtime to Rust for $120K

48 points · 62 comments · pjmlp

  1. meerita · · focus · HN ↗
    I wrote to the post of Andrea (a dev from the Copilot team) about their 800K LoC: 128 PRs, shipped incrementally. Existing end-to-end tests ran against the new code at every step.

    Total: ~1,301,378 lines of Rust.

    Production: 832,378 Unit tests: ~469,000 Combined: ~1.30 million lines

    On top of the 832K LoC are mostly tests she answered:

    > Yeap, 832,378 lines of production Rust. the +800K number is production only; unit tests are another +469K on top.

    <a href="https:&#x2F;&#x2F;x.com&#x2F;acolombiadev&#x2F;status&#x2F;2100660224298193081?s=20" rel="nofollow">https:&#x2F;&#x2F;x.com&#x2F;acolombiadev&#x2F;status&#x2F;2100660224298193081?s=20

    1. jsnell · · focus · HN ↗
      &gt; Half of the 832K LoC are mostly tests she answered:

      No? That quote is clearly saying the opposite of your summary.

      1. meerita · · focus · HN ↗
        True! I edited.
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