The gate spent almost all its time rebuilding identical contexts: init is
~50 ms interpreted / ~900 ms compiled (tier loading, analyzer build, macro
recompilation), and both the conformance harness and the spec harness built a
fresh ctx PER CASE — 269 cases x 3 modes for conformance alone (~285 s), and
~1500 spec cases (~90 s). The suite battery additionally ran its 234 worker
subprocesses sequentially (~100 s incl. 5 x 6 s timeout files).
- api: snapshot/fork — marshal a fully-built ctx once (reverse-lookup dicts
from root-env, built at module load before any ctx exists), unmarshal cheap
fully-isolated deep copies (~2 ms). A fork shares nothing mutable with its
siblings, so per-case isolation is preserved exactly.
- conformance: one init per mode + fork per case (self-host pre-builds the
analyzer before snapshotting). 285 s -> 5 s, same 269x3 results.
- spec harness: jeval/run-spec/expect-throws fork from one lazy module-level
snapshot. Spec sweep ~90 s -> 9 s, all pass.
- clojure-test-suite: run the per-file worker subprocesses through a
token-channel worker pool (default 4, JOLT_SUITE_WORKERS to override,
capped at 8). 17.5 s with counts identical to the sequential run
(4046/520/116, 5 timeouts).
Full gate wall-clock: ~8 min -> 43 s, everything green (conformance 269x3,
fallback-zero, fixpoint, self-host, sci, staged, suite >= 4034/67, all
specs+unit).
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