04180c1e4e
Profiling jolt-i5if showed <=60-bit arithmetic is already native-fast; the real general overhead in the run/-e/-m path is var resolution. Every var reference compiled to (var-deref ns name), which builds + hashes a fresh "ns/name" string and does a hashtable lookup per access (~45ns). The var cell is interned and def-var! mutates it in place, so caching the resolved cell is sound under redefinition. Generalize the devirt per-site cache-cell mechanism to var value references: a ref inside a fn resolves its cell once into the def's closure, then reads it via var-cell-deref (a field read after the first). var-cell-deref is the cell-based var-deref — binding-aware (dynamic vars + *ns* still resolve) and lenient on an unbound root (a forward-declared var doesn't throw, unlike jolt-var-get). Gated by a runtime flag: ON for runtime-compiled code (compile-eval.ss), OFF for the seed mint and AOT build (emit-image.ss) so the seed stays a byte-fixpoint -- prelude.ss is unchanged, only image.ss picks up the new backend. ~5x on a var-ref-heavy loop (1058ms->205ms); ~1.2x on test.check (its generators are more deftype/dispatch-bound than var-deref-bound). No C/FFI. Corpus rows pin redefinition / dynamic binding / forward ref through a cached ref. make test + shakesmoke green, selfhost holds, SCI 211/218, certify 0-new. |
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|---|---|---|
| .. | ||
| build-app | ||
| bench-chez.ss | ||
| clojure-test.clj | ||
| corpus.edn | ||
| directlink-test.ss | ||
| ffi-binding-test.ss | ||
| inline-test.ss | ||
| numeric-test.ss | ||
| README.md | ||
| transient-test.ss | ||
| unit.edn | ||
| values-test.ss | ||
Chez test harness
The correctness gate for jolt. Pure Chez (+ Clojure for the JVM oracle).
Correctness is judged against the JVM-sourced conformance spec; the spec itself
lives in test/conformance/ (see its SPEC.md). Run the whole gate with make test from the repo root.
The spec corpus
corpus.edn is the contract: ~2920 rows {:suite :label :expected :actual}, with
:expected sourced from reference JVM Clojure by test/conformance/regen-corpus.clj.
It is frozen (the canonical source) — add or change cases here, then re-source the
answers with regen-corpus.clj and re-certify with test/conformance/certify.clj.
The gate runners (host/chez/)
-
run-corpus.ss— runs every corpus case through the spine (read → analyze → IR → emit → eval, all on Chez), comparing each result by value-equality against the JVM:expected. Aknown-failallowlist covers cases jolt can't match because Chez has no JVM host (Java classes, arrays,BigDecimal, opaque host-object printers, …); the gate fails only on a NEW divergence or if the pass count drops below the floor.chez --script host/chez/run-corpus.ss JOLT_CORPUS_LIMIT=200 … # every-Nth stride, fast iteration JOLT_CHEZ_ZJ_FLOOR=N … # override the floor (default 2678) -
run-unit.ss— host-specific unit cases (test/chez/unit.edn) that aren't in the JVM-portable corpus: dot-forms, java statics, io, reader, walk, vars/namespaces, refs. Each:expris evaluated in-process and its printed value compared to a baked:expected(:throwsasserts a raise). -
selfcheck.sh— self-host fixpoint:bootstrap.ssrebuild byte-equals the checked-in seed (host/chez/seed/). -
smoke.sh— realbin/joltc -eCLI smoke.
Other Chez tests
values-test.ss— the value model (nil/truthiness/collections).make values.bench-chez.ss— compute bench through the pipeline (opt-in; not in the gate).
All runners assume chez on PATH.