Every walk over a lazy seq created FRESH wrapper tables around the shared
rest-thunks (ls-rest, ls-seq/ls-count, realize-for-iteration, the printers,
reduce — each had its own make-lazy-seq loop), so independent walks re-ran
the thunks: side effects duplicated, and a doall'd seq of futures was
re-spawned serially by the deref walk. Every walker now goes through
ls-rest-cached, which memoizes the rest wrapper on its node — thunks run
exactly once, as in Clojure. Costs ~10% on walk-heavy benches (the per-node
cache get/put — Clojure's LazySeq pays the same); net still -9% vs the
pre-linear-walks baseline. Three regression rows pin once-only effects and
value stability across walks.
On top of that: pmap/pcalls/pvalues (jolt-oeu) over the real-thread futures
— spawn-all-then-deref (the once-only fix is what makes the doall actually
mean that), snapshot semantics documented, multi-coll arity via the
canonical vector-zip. System/currentTimeMillis + nanoTime land as System
statics (the realtime clock — os/time is whole seconds, which quantized
every elapsed measurement to 1000ms). Seven pmap rows incl. a generous-
margin parallelism check (4 x 200ms sleeps under 700ms after warmup).
Mine the phase* port batteries into the spec layer and delete them (their
behavior is now covered by spec): phase5 (hierarchies), phase6 (tagged
literals/reader-conditionals), phase7 (lazy/sets), phase8+phase12 (protocols;
phase12 was a duplicate of phase8), phase10 (strings/set), phase13
(reify/walk). Unique cases mined into spec: reader #inst/#uuid/#?@ splice,
(Type. args) dot constructor, lazy-seq body-runs-once, keywordize-keys/
stringify-keys, custom :default key and explicit :hierarchy dispatch.
phase6-final tested the COMPILE-MODE path ({:compile? true}), distinct from the
interpreter-based spec — kept and renamed integration/compile-mode-test.
jpm test green, conformance 218/218.
Add spec suites covering lazy-seq/lazy-cat laziness, infinite + self-referential
seqs (ones/nats/fib), realized?; transducers (map/filter/take/cat/keep/mapcat as
xforms, comp, into/transduce/sequence/eduction/completing); and metadata
(with-meta/meta/vary-meta/^ reader). All passed against jolt as written — no
implementation changes needed. jpm test green.
