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This PR extracts the example programs from the sym mvcgen benchmarks into shared `Cases.*` modules so that both benchmarks and a new fast test suite can reuse them. It also renames `vcgen_deep_add_sub_cancel` to `vcgen_add_sub_cancel_deep` for consistency. The test suite (`test_vcgen.lean`) runs all cases at n=10, completing in ~2s vs minutes for the full benchmarks. It is wired up as a `lake test` driver and integrated with the lean4 test/bench infrastructure via `run_test`/`run_bench` scripts registered in `CMakeLists.txt`. Benchmark output now uses aligned `CaseName(n):` labels. The `run_bench` script extracts per-case vcgen and kernel timings into `measurements.jsonl`. Benchmarks run single-threaded (`LEAN_NUM_THREADS=1`) for reproducibility. `vcgen_get_throw_set` is excluded from benchmarks due to pathological `instantiateMVars` behavior. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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