Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
c4a664eb5d
This PR adds checkSystem calls to the LCNF compiler to improve IDE cancellation responsiveness during compilation of large declarations. Two changes: 1. `Pass.mkPerDeclaration` now calls `checkSystem` before processing each declaration, allowing interruption between declarations. 2. The LCNF `simp` pass calls `checkSystem` every 128 recursive visits, allowing interruption within large single-declaration simplifications. Note: LCNF simp has its own custom `withIncRecDepth` (in `SimpM.lean`) that does **not** call `checkInterrupted`, unlike `Core.withIncRecDepth`. So this `checkSystem` call is the only cancellation check on this code path. Performance: unconditional `checkSystem` added +0.44% instructions on `big_do.lean` per CI benchmarks. Amortizing to every 128 visits brings overhead to noise level while keeping the max simp gap under ~80M instructions (~14ms at 6 Ginstr/s). **Before** (measured with `LEAN_CHECK_SYSTEM_INTERVAL_INSN` on the instrumentation branch): | Test | Largest LCNF gap | Time at 6 Ginstr/s | |------|------------------|-------------------| | `big_do.lean` | 12,623M insn (simp) | 2.1s | | `riscv-ast.lean` | 1,162M insn (simp) | 194ms | | `riscv-ast.lean` | 37 gaps total | — | **After:** | Test | Largest LCNF gap | Time at 6 Ginstr/s | |------|------------------|-------------------| | `big_do.lean` | 869M insn (resetReuse) | 145ms | | `riscv-ast.lean` | 232M insn (simp) | 39ms | | `riscv-ast.lean` | reduced gap count | — | Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com> |
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