[acamarata]

What

free/ci/bench: Go benchmarks plus the cibench process harness that times the V15 engine against the frozen v1.4 gate (startup, detect, plan, store open, executor overhead, end-to-end on a tiny Go and a medium Go plus Node fixture, service start behind -services). It emits perfbench/v1 result JSON that the cli's own perfbench check reads. Budgets: perf-budget.json (linux/amd64) and perf-budget-darwin-arm64.json, each the worst p95 of three 20-sample runs plus 25 percent. ci-bench.yml runs on PRs that touch free/ci/: harness tests, measure, perfbench check from a pinned cli checkout, the relative budget, and controls (a result ten times over budget must fail both checks).

Result you need to read first

The relative budget (V15 tiny median <= v1.4 tiny median x 1.10 + 250 ms) is missed on both platforms: linux/amd64 about 1.3 s against a 0.59 s limit, macos-arm64 about 1.5 s. Cause (measured, not guessed): the exec funnel forks ps -A three times per tracker snapshot for every funnel call, and a bare run makes about 22 funnel git calls; strace counts 135 ps execs in one tiny run. A miss fails the Ticket unless the owner accepts a written exception, so ci-bench.yml fails its ratio step until the engine is fixed or an exception is committed in bench/ratio-exceptions.json (an entry without accepted_by does not count). Evidence and the exception request: hq plan/p7/evidence/CI-46-perf.md.

Also found: on Linux the engine runs every job under ulimit -v from a 256 MB default demand, which kills go and node at start. The fixtures set requires.mem_mb to work around it.

Scope notes

• Three files outside the Ticket write_scope are touched by lead ruling (same pattern as P7-CI-32): architecture/layers.yaml (rows for bench and bench/cmd/cibench), architecture/layers_test.go (os/exec exemption for bench/spawn.go only), internal/nodes/provision/single_exec_test.go (bench/spawn.go:spawn). The timing tool must not run inside the engine funnel whose overhead it measures.
• perfbench check defaults to -min-n 20; the Ticket's N=10 needs -min-n 10 on that verify line. The workflow uses 20 runs and the default.

[acamarata]

Parked ready, not merged. Required check passes; independent Sonnet review (clean checkout) found no must-fix and its should-fix items are in. ci-bench is red by design: the relative budget is missed (V15 tiny median 4 to 10 times v1.4 on linux/amd64 and darwin/arm64; cause D-1008, evidence hq plan/p7/evidence/CI-46-perf.md) and a missed budget fails the Ticket unless the owner accepts a written exception. Merging now would turn ci-bench red on every free/ci PR. Next step: an accepted entry in free/ci/bench/ratio-exceptions.json (or the D-1008 fix), then merge. gitleaks is red on main too (e23f267).