Re-measure the gate: #267 is refuted and its cost moved to verify:rust - #385
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#267 recorded vitest's per-module transform as "the largest single lever measured so far" - 3.7x on test/findIslands.spec.ts, 162.11s against 43.63s pre-bundled. Re-running that same A/B on today's tree, three interleaved rounds per arm with 11/11 passing every run, returns 0.99x. The issue called this itself: it named deleting the TypeScript noise math as the thing that removes the tax. #227 and #371 did that, taking src/noise/ from 99 modules to 25, and the tax scaled with the module count. Suite-wide, the import line item went 29.8% -> 3.8%. What nobody had re-measured is where the cost went instead. The gate's composition has inverted: verify:rust 112.0s 54% (CLAUDE.md said the Rust phase "adds ~1.6s", vp test 80.3s 39% and verify-rust.sh's own header claimed preview:test 8.0s 4% 0.84s warm - wrong by over a hundredfold) check:vue 3.8s 2% vp check 2.0s 1% Inside verify:rust, cargo test --features poison is 82.4s of the 112.0s. Narrowing it to the 77 tests the gate requires was measured and buys nothing: fixtures:: alone runs 108 tests instead of 452 and still costs 81.3s. The required tests are the expensive ones, and the perturbation is why - those same 108 cost 20.8s clean against 81.2s poisoned. Inside vp test, the wall is one file again: wasmVulcanusRenderParity.spec.ts is 79.8s of the 80.3s wall, and two files hold 66% of all test time. Two more levers measured and refuted in the same pass. environment: "node" relocates its cost rather than removing it - environment 83ms -> 0ms while setup 11ms -> 91ms, because test/setup.ts builds its own happy-dom Window for localStorage, so the totals are indistinguishable. And CLAUDE.md claimed "node" was already the default when vite.config.ts sets happy-dom. #203's rejection of splitting the heaviest spec file rested on import being first-order (332s importing against 260s testing, a 99-module re-import per added file). That is now 9.4s against 208.3s on a 26-module graph, and the heaviest file's own import line is 58ms. #203's durable point still stands, so this records that the arithmetic changed rather than proposing a split. Also corrects every live reference to test/previewAgreement.spec.ts, which #360 deleted - including a present-tense rule in CLAUDE.md and ten comments in the wasm parity specs that cite it as a live cross-check. No product code, no test logic, and no frozen count changes. Nothing under crates/ is touched, so engine.wasm is unaffected. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011d4hzpWHS7PnUHcwCSg8xE
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Included review availability: Your plan provides up to 10 included reviews per hour; 7 remain after this review. 📝 WalkthroughWalkthroughThe changes refresh verification timing, runtime evaluation, and WASM parity documentation. They replace outdated measurements and references to the deleted ChangesPerformance documentation refresh
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In `@scripts/verify-rust.sh`:
- Around line 9-10: Update the timing header in scripts/verify-rust.sh to
accurately name cargo test --locked --workspace and cargo test --locked -p
fmw-noise --features poison, and label the 80.3s phase as vp run --cache test or
its nested vp test script. Leave the Rust command references in CLAUDE.md at
lines 310 and 364 unchanged.
In `@test/diffArtifacts.ts`:
- Around line 32-35: Update the helper documentation to acknowledge all three
active callers, including test/wasmFulgoraRenderParity.spec.ts, rather than
implying only two callers; retain the existing identification of the two
heaviest callers and their timing details.
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…allers Both were my own imprecision in the previous commit, and both are the same class of error this PR exists to fix. - verify-rust.sh's new header said `cargo test --workspace` where the script runs `cargo test --locked --workspace`, and gave the 82.4s figure as "poison" without naming `cargo test --locked -p fmw-noise --features poison`. - diffArtifacts.ts said "its callers are the two heaviest files in the suite" and then named two. It has THREE callers - wasmFulgoraRenderParity.spec.ts is the third, and at 5.4s it is nowhere near the other two, which is worth saying rather than eliding. Also labels the gate table's test row `vp run --cache test` (on a MISS), which is what `verify` actually invokes, and says so: uncached is what CI always pays and what a real edit pays locally, while a cache hit makes that row ~0.6s and the percentages meaningless. verify:rust is not cached at all, which is the practical reason it dominates. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011d4hzpWHS7PnUHcwCSg8xE
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Closes #267.
#267 recorded vitest's per-module transform as "the largest single lever
measured so far": 3.7x on
test/findIslands.spec.ts, 162.11s against 43.63spre-bundled. I re-ran that same A/B on today's tree - three interleaved
rounds per arm, 11/11 passing every run:
src/pre-bundled by esbuild0.99x. The lever is gone, and #267 predicted exactly this - its own "Why
this is filed rather than fixed" section names deleting the TypeScript noise
math as the thing that removes the tax. #227 and #371 did that, taking
src/noise/from 99 modules to 25. Suite-wideimportwent 29.8% -> 3.8%.What this PR is actually for
Re-measuring #267 meant re-measuring the gate, and the composition has
inverted without anyone writing it down. Measured 2026-09-05, all green:
verify:rustvp testpreview:testcheck:vuevp checkCLAUDE.mdsaid the Rust phase "adds ~1.6s" and thatvp testwas 88% of thegate;
scripts/verify-rust.sh's own header claimed "1.62s cold, 0.84s warm".That is wrong by more than a hundredfold, and it cannot ever have described a
script that runs the crate's tests twice.
verify:rust:cargo test --features poisonis 82.4s of the112.0s. Narrowing it to the 77 tests the gate requires was measured and buys
nothing -
fixtures::alone runs 108 tests instead of 452 and still costs81.3s. The required tests are the expensive ones, and the perturbation is
why: those same 108 cost 20.8s clean against 81.2s poisoned, 3.9x.
Whether that blowup is inherent is explicitly recorded as not measured.
vp test: the wall is one file again -wasmVulcanusRenderParity.spec.tsis 79.8s of the 80.3s wall, two files are66% of all test time, and only 12 files exceed 1s.
Two more levers measured and refuted
environment: "node"- the cost relocates.environment83ms -> 0mswhile
setup11ms -> 91ms, becausetest/setup.tsbuilds its own happy-domWindowforlocalStorage; totals are indistinguishable (159/156ms against154/165ms). Reading the
environmentcolumn alone shows a fake 20.9s win.CLAUDE.mdalso claimednodewas already the default, whilevite.config.ts:51setshappy-dom.being first-order - 332s importing against 260s testing, with a 99-module
re-import per added file. Today that is 9.4s against 208.3s on a 26-module
graph, and the heaviest file's own import line is 58ms. docs(ci): record the shard timings after the scrap work, and fix the timeout they exposed #203's durable
point still stands (adding a file re-slices every shard), so this records
that the arithmetic changed; it does not propose a split.
previewAgreement.spec.tsno longer exists#360 deleted it. This corrects every live reference: a present-tense rule in
CLAUDE.md, thetest/diffArtifacts.tsheader that names it as the motivatingcase, and ten comments across the three wasm parity specs that cite it as a
live cross-check for their frozen numbers. Those numbers are unaffected - they
now stand alone, and the comments say so.
Archives are deliberately untouched:
docs/rust-wasm-port-history.mdanddocs/superpowers/**are point-in-time records..github/workflows/verify.ymlgets a dated correction appended rather than a rewrite, for the same reason.
Verification
pnpm run verifygreen: 125 files, 1168 tests, plus preview 13 and the fullRust phase. No product code, no test logic, and no frozen count changes.
Nothing under
crates/is touched, soengine.wasmis unaffected - confirmedwith
git diff --name-only.🤖 Generated with Claude Code
https://claude.ai/code/session_011d4hzpWHS7PnUHcwCSg8xE
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