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eager: skip_line as a jet, proven sound - #41
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EagerGraphNilMmap32Jets, the eager runner's evaluator, answers lambada's skip_line natively after the memo, which records the answer: a 5 MB compile_file reduces in 162,874 steps instead of 6,487,439. EagerGraphNilMmap32 compiles to main's code. RUNNER_JETS=0 turns the jet off, and the reduction is then main's step for step; RUNNER_STATS counts jets= and skipped=. embed.mjs writes jets.hpp and Jets/Trees.lean from trees/*.dag, test.sh checks them; runtimeJets_sound. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018ffv5AybPTpV56D5vuayQr
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main. Merge after #59.EagerGraphNilMmap32Jets, the eager runner's evaluator, answers lambada'sskip_linenatively. It checks the memo first and records the answer there.EagerGraphNilMmap32 = BasicEagerGraphNilMmap32<false>compiles to main's code.Measured with #59 applied (cachegrind):
Where no jet fires, the check itself costs +0.27%. The rest of the load overhead is 9,506 extra steps: the jet's trees are interned at startup, which shifts the arena indices the memo is keyed on.
Off switch:
RUNNER_JETS=0skips interning the jet's trees, so the reduction is main's step for step.RUNNER_STATSaddsjets=andskipped=.Soundness:
runtimeJets_sound(Cpp/Jets.lean) concludesApply. It usespropext,Classical.choiceandQuot.sound.Drift check:
embed.mjswritesjets.hppandJets/Trees.leanfromtrees/*.dag, andtest.shfails if either drifts.Tests:
test.shpasses underCandC.UTF-8:test-jets.cpp: 5 checks;reduce_canonicalize: 4.The suite catches all 29 deliberately broken versions of the code that change an answer.
🤖 Generated with Claude Code
https://claude.ai/code/session_018ffv5AybPTpV56D5vuayQr