Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
2d87d50e34
This PR fixe a superliniear behavior in the closed subterm extractor. Consider an LCNF of the shape: ``` let x1 := f arg let x2 := f x1 let x3 := f x2 let x4 := f x3 ... ``` In this case the previous closed term extraction algorithm would visit `x1`, then `x2` and `x1`, then `x3`,`x2`,`x1` and so on, failing each time. We now introduce a cache to avoid this behavior. |
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