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Repin opencascade.js to the real-raw_destructor fork; 5% growth step; docs
The repeat-run ratchet was never the growth ladder: upstream opencascade.js's generator emitted a NO-OP raw_destructor<T> for every class with a 2-arg operator delete (DEFINE_STANDARD_ALLOC ⇒ ~all of OCCT), so .delete() on method-returned embind values never freed — the mesher extraction alone leaked ~0.6-0.9 KB/node/run (the 85-100 MB/run ratchet) and pysrc=real evaluation carried ~40 MB more. Root-caused at the heap-byte level (probe-free4/5/6, probe-stride: ctor objects reused their chunk, method returns never did), fixed in the fork (3767f28), plus -sMEMORY_GROWTH_GEOMETRIC_STEP=0.05 (6eeb02f). pyodide+real heat_exchanger: single run 238.5 → 175.9 MB (eval-end 95.8 → 55.1), repeat ratchet 85-105 → 18-24 MB/run; JS-mode cached-scene repeats now dead flat; lite legs 137.8 / ~24.6 per-run; eval times unchanged. Gates on the final build: mesh payload hashes identical on 5 corpus models (mesh-sig.mjs), starter screenshot correct, fast specs 16/16, full suite 101 passed, harness pyodide+real 217/2/2/1 (per-script identical to the committed results.json except docs-rst/tips/b04 MISMATCH→PASS — the documented complete-tie traversal flap moving PASS-ward under changed pointer-hash enumeration), micropython default 216/2/3/1 (strict subset of the documented band), Brython control exactly 206/10/5/1. Ownership audit before enabling real frees (probe-own.mjs): embind COPIES class-type const-ref returns, so every existing delete-site deletes an owned copy; Handle.get() raws remain non-owning and are never deleted. Records: runtime-comparison.md §13, experiments/heavy-memory/STATE.md. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
1 parent 8c27269 commit 6f6bfc4

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‎experiments/heavy-memory/STATE.md‎

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@@ -159,3 +159,54 @@ The first harness pass surfaced two ENVIRONMENTAL failures (import_step
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assets: /tmp/b123d had been tmp-cleaned — restored as a symlink to
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~/Desktop/build123d; run.sh/collect.py expect that clone) and ONE real
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regression (arg-wrap handle lifetime, fixed above).
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---
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# Mesh-transients round — state (2026-08-21, branch feat/mesh-transients)
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Full story + final matrix in runtime-comparison.md §13. Short version:
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1. **Attribution**: the whole ~140 MB heavy mesh transient is INSIDE the
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BRepMesh_IncrementalMesh ctor (marks: eval-end → mesh-tri-done carries
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it all; extraction/normals/isos/Clean add zero high-water; retained
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triangulations ~9 MB; JS extraction arrays ~14 MB JS-heap). Census is
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emitted per run in the `mesh-census` mark.
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2. **Streaming mesher landed** (commit 8c27269): mesh → extract per
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compound child, algo deleted per chunk, single end-of-mesh Clean (so
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shared subshapes are meshed once — per-chunk Clean would re-mesh them
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differently). Payload emission-order and hash IDENTICAL (mesh-sig.mjs).
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Multi-solid scenes: 365→78 MB. heat_exchanger = one chunk: unchanged.
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3. **The ratchet was NEVER the growth ladder**: 0.05 growth step (fork
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6eeb02f) bought one rung (238.5→207.5 single) but repeats still
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ratcheted ~85/run; 64 KB free census showed the space genuinely gone;
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dlmalloc == emmalloc creep (mimalloc worse floor — rejected, reverted).
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4. **ROOT CAUSE: upstream ocjs generator no-ops raw_destructor<T> for any
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class with a 2-arg operator delete — DEFINE_STANDARD_ALLOC matches on
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~every OCCT class ⇒ .delete() NEVER freed method-returned values**
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(heap-byte proof in probe-free4/5/6; per-pattern reuse in
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probe-stride). Only ctor-overload subclasses (gp_Pnt_1...) ever freed.
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Fork fix 3767f28 (bindings.py): no-op only for non-public dtors /
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placement-only deletes; nested select_overload return types qualified
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(Bnd_Box::Limits — regen used to silently drop the class). 2,044
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classes now really destruct. d.ts identical, 400 handles, wasm +349 B.
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5. **Results** (pyodide+real heavy): single 238.5 → **175.9 MB** (target
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≤180 MET), ratchet 85-105 → **18-24 MB/run** (target ≤20 ~met), eval
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time unchanged. JS-mode cached-scene repeats now DEAD FLAT. Lite legs:
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137.8 single / ~24.6 per-run (glue-side retention — future round).
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mp+upstream unchanged (no __del__ — interpreter follow-up).
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6. **Gates**: mesh-sig 5/5 identical; specs 16/16; suite 101; harness
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pyodide+real 217/2/2/1 = committed per-script except tips/b04
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MISMATCH→PASS (documented complete-tie traversal flap, PASS-ward);
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mp 216/2/3/1 (subset of documented band); brython exactly 206/10/5/1.
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7. **Ownership rules verified before enabling real frees** (probe-own):
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embind COPIES const-ref class returns (Current/Nodes/XYZ are owned
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copies — safe to delete); Handle.get() raws stay non-owning (never
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delete — now a REAL double-free). All existing delete-sites audited
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clean.
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New tools: mesh-sig.mjs (payload-equivalence gate), probe-stream.mjs
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(streaming A/B), probe-meshiso*.mjs (leak bisection), probe-pair/ptr/
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stride/free3-7/own/delcheck*/jsfree/embind (the discovery chain), shot.mjs
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(starter screenshot). probe-marks/free2 now take CS_TEST_PORT; probe-marks
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free census is opt-in (CS_FREE_PROBE=1 — the census itself forces growth
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rungs).

‎experiments/heavy-memory/mesh-sig.mjs‎

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};
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});
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// settle: let any late starter render land before sampling counts
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await new Promise((r) => setTimeout(r, 2000));
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const results = {};
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for (const m of MODELS) {
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const code = m.code || await page.evaluate(() =>

‎experiments/heavy-memory/probe-delcheck.mjs‎

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// probe-delcheck.mjs — count del() failures / double-ptr anomalies per iteration
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import { chromium } from 'playwright';
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const PORT = process.env.CS_TEST_PORT || '8452';
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const CODE = `
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let oc = self.oc;
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let failures = 0, attempts = 0, noptr = 0;
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let del = (...a) => { for (const o of a) {
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attempts++;
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try {
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if (o && o.$$ && o.$$.ptr) { o.delete(); }
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else { noptr++; }
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} catch (e) { failures++; }
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} };
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let t = Text3D("CascadeStudio0", 40, 8);
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let mb = () => (self.ocMemory.buffer.byteLength / 1048576).toFixed(1);
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let mesher = new oc.BRepMesh_IncrementalMesh_2(t, 0.1, false, 0.5, false);
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del(mesher);
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console.log('DELCHK start ' + mb());
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for (let i = 0; i < 20; i++) {
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failures = 0; attempts = 0; noptr = 0;
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self.ForEachFace(t, (fi, face) => {
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let loc = new oc.TopLoc_Location_1();
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let myT = oc.BRep_Tool.Triangulation(face, loc, 0);
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if (!myT.IsNull()) {
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const T = myT.get();
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const trsf = loc.Transformation();
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let n = T.NbNodes();
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for (let k = 1; k <= n; k++) { let p0 = T.Node(k); let p = p0.Transformed(trsf); p.X(); del(p0, p); }
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if (!T.HasNormals()) { T.ComputeNormals(); }
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for (let k = 0; k < n; k++) { let d0 = T.Normal_1(k + 1); let d = d0.Transformed(trsf); d.X(); del(d0, d); }
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let nt = T.NbTriangles();
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for (let k = 1; k <= nt; k++) { let tr = T.Triangle(k); tr.Value(1); del(tr); }
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del(trsf);
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}
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del(myT, loc);
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});
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console.log('DELCHK iter' + i + ' ' + mb() + ' attempts ' + attempts + ' failures ' + failures + ' noptr ' + noptr);
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}
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`;
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async function main() {
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const browser = await chromium.launch({ headless: !process.env.CS_TEST_HEADFUL,
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args: ['--use-gl=angle', '--use-angle=swiftshader'] });
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const page = await (await browser.newContext()).newPage();
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page.on('pageerror', () => {});
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const seen = new Set();
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page.on('console', (m) => { const t = m.text(); if (t.includes('DELCHK') && !seen.has(t)) { seen.add(t); console.log(t); } });
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await page.goto(`http://localhost:${PORT}/?mode=cascadestudio`, { timeout: 60000 });
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await page.waitForFunction(() => window.CascadeAPI && window.CascadeAPI.isReady(), undefined, { timeout: 120000 });
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 300000 });
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await page.evaluate((c) => window.CascadeAPI.runCode(c), CODE);
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 600000 });
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await new Promise((r) => setTimeout(r, 1500));
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await browser.close();
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}
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main().catch((e) => { console.error(e); process.exit(1); });

‎experiments/heavy-memory/probe-delcheck2.mjs‎

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// probe-delcheck2.mjs — which sub-loop retains memory (post-onset slope)?
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import { chromium } from 'playwright';
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const PORT = process.env.CS_TEST_PORT || '8452';
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const V = process.argv[2] || 'nodes';
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const INNER = {
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nodes: `let n = T.NbNodes();
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for (let k = 1; k <= n; k++) { let p0 = T.Node(k); let p = p0.Transformed(trsf); p.X(); del(p0, p); }`,
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nodesplain: `let n = T.NbNodes();
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for (let k = 1; k <= n; k++) { let p0 = T.Node(k); p0.X(); del(p0); }`,
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ctorplain: `let n = T.NbNodes();
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for (let k = 1; k <= n; k++) { let p0 = new oc.gp_Pnt_1(); p0.X(); del(p0); }`,
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tris: `let nt = T.NbTriangles();
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for (let k = 1; k <= nt; k++) { let tr = T.Triangle(k); tr.Value(1); del(tr); }`,
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facesonly: ``,
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};
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const CODE = `
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let oc = self.oc;
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let del = (...a) => { for (const o of a) { try { if (o && o.$$ && o.$$.ptr) o.delete(); } catch (e) {} } };
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let t = Text3D("CascadeStudio0", 40, 8);
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let mb = () => (self.ocMemory.buffer.byteLength / 1048576).toFixed(1);
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let mesher = new oc.BRepMesh_IncrementalMesh_2(t, 0.1, false, 0.5, false);
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del(mesher);
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console.log('DEL2 ${V} start ' + mb());
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for (let i = 0; i < 40; i++) {
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self.ForEachFace(t, (fi, face) => {
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let loc = new oc.TopLoc_Location_1();
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let myT = oc.BRep_Tool.Triangulation(face, loc, 0);
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if (!myT.IsNull()) {
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const T = myT.get();
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const trsf = loc.Transformation();
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${INNER[V]}
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del(trsf);
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}
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del(myT, loc);
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});
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if (i % 4 === 3) console.log('DEL2 ${V} iter' + i + ' ' + mb());
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}
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`;
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async function main() {
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const browser = await chromium.launch({ headless: !process.env.CS_TEST_HEADFUL,
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args: ['--use-gl=angle', '--use-angle=swiftshader'] });
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const page = await (await browser.newContext()).newPage();
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page.on('pageerror', () => {});
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const seen = new Set();
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page.on('console', (m) => { const t = m.text(); if (t.includes('DEL2') && !seen.has(t)) { seen.add(t); console.log(t); } });
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await page.goto(`http://localhost:${PORT}/?mode=cascadestudio`, { timeout: 60000 });
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await page.waitForFunction(() => window.CascadeAPI && window.CascadeAPI.isReady(), undefined, { timeout: 120000 });
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 300000 });
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await page.evaluate((c) => window.CascadeAPI.runCode(c), CODE);
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 600000 });
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await new Promise((r) => setTimeout(r, 1500));
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await browser.close();
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}
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main().catch((e) => { console.error(e); process.exit(1); });

‎experiments/heavy-memory/probe-embind.mjs‎

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// probe-embind.mjs — per-call wasm leak isolation on candidate embind paths
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import { chromium } from 'playwright';
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const PORT = process.env.CS_TEST_PORT || '8452';
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const CODE = `
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let oc = self.oc;
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let mb = () => self.ocMemory.buffer.byteLength;
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let del = (o) => { try { if (o && o.$$ && o.$$.ptr) o.delete(); } catch (e) {} };
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let box = Box(10, 10, 10);
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let mesher = new oc.BRepMesh_IncrementalMesh_2(box, 0.1, false, 0.5, false);
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del(mesher);
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let loc = new oc.TopLoc_Location_1();
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let face = null;
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self.ForEachFace(box, (i, f) => { if (!face) face = f; });
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let myT = oc.BRep_Tool.Triangulation(face, loc, 0);
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let T = myT.get();
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let trsf = loc.Transformation();
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let scratch = new oc.gp_Pnt_1();
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const N = 100000;
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const tests = {
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'ctor gp_Pnt_1': () => { let p = new oc.gp_Pnt_1(); del(p); },
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'T.Node(1)': () => { let p = T.Node(1); del(p); },
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'T.NbNodes()': () => { T.NbNodes(); },
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'scratch.Transformed(trsf)': () => { let p = scratch.Transformed(trsf); del(p); },
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'scratch.X()': () => { scratch.X(); },
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'T.Triangle(1)': () => { let t = T.Triangle(1); del(t); },
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'trsf2 = loc.Transformation()': () => { let t2 = loc.Transformation(); del(t2); },
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};
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for (const [name, fn] of Object.entries(tests)) {
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for (let i = 0; i < 1000; i++) fn(); // warm the free lists
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const b0 = mb();
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for (let i = 0; i < N; i++) fn();
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const d = mb() - b0;
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console.log('EMBINDLEAK ' + name + ': ' + (d / N).toFixed(2) + ' B/call (total ' + (d / 1048576).toFixed(1) + ' MB)');
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}
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del(scratch); del(trsf); del(T); del(myT); del(loc);
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Box(1, 1, 1);
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`;
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async function main() {
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const browser = await chromium.launch({ headless: !process.env.CS_TEST_HEADFUL,
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args: ['--use-gl=angle', '--use-angle=swiftshader'] });
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const page = await (await browser.newContext()).newPage();
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page.on('pageerror', () => {});
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const seen = new Set();
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page.on('console', (m) => { const t = m.text(); if (t.includes('EMBINDLEAK') && !seen.has(t)) { seen.add(t); console.log(t); } });
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await page.goto(`http://localhost:${PORT}/?mode=cascadestudio`, { timeout: 60000 });
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await page.waitForFunction(() => window.CascadeAPI && window.CascadeAPI.isReady(), undefined, { timeout: 120000 });
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 300000 });
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await page.evaluate((c) => window.CascadeAPI.runCode(c), CODE);
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 600000 });
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await new Promise((r) => setTimeout(r, 1500));
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await browser.close();
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}
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main().catch((e) => { console.error(e); process.exit(1); });

‎experiments/heavy-memory/probe-free2.mjs‎

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const page = await (await browser.newContext()).newPage();
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page.on('pageerror', () => {});
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page.on('console', (m) => { const t = m.text(); if (t.includes('FREEMB:')) console.log('SAMPLE ' + t); });
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await page.goto('http://localhost:8441/?mode=python&pyruntime=pyodide&pysrc=real', { timeout: 60000 });
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await page.goto(`http://localhost:${process.env.CS_TEST_PORT || '8441'}/?mode=python&pyruntime=pyodide&pysrc=real`, { timeout: 60000 });
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await page.waitForFunction(() => window.CascadeAPI && window.CascadeAPI.isReady(), undefined, { timeout: 90000 });
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 300000 });
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for (let i = 0; i < 2; i++) {
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for (let i = 0; i < 3; i++) {
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await page.evaluate(async (c) => { window.CascadeAPI.setMode('python'); return window.CascadeAPI.runCode(c); }, HEAVY);
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 600000 });
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await page.evaluate(async (c) => {

‎experiments/heavy-memory/probe-free3.mjs‎

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// probe-free3.mjs — does delete() actually free method-returned objects?
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import { chromium } from 'playwright';
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const PORT = process.env.CS_TEST_PORT || '8452';
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const CODE = `
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let oc = self.oc;
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let t = Text3D("CascadeStudio0", 40, 8);
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let mesher = new oc.BRepMesh_IncrementalMesh_2(t, 0.1, false, 0.5, false);
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mesher.delete();
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let face0 = null, loc = new oc.TopLoc_Location_1();
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self.ForEachFace(t, (i, f) => { if (!face0) { face0 = f; } });
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let myT = oc.BRep_Tool.Triangulation(face0, loc, 0);
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let T = myT.get();
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// ctor path
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let c1 = new oc.gp_Pnt_1(); const pc1 = c1.$$.ptr; const cnt1 = c1.$$.count.value; c1.delete();
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let c2 = new oc.gp_Pnt_1(); const pc2 = c2.$$.ptr; c2.delete();
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console.log('FREE3 ctor: ptr1=' + pc1 + ' ptr2=' + pc2 + ' reused=' + (pc1 === pc2) + ' count=' + cnt1);
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// method-return path
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let a = T.Node(1); const pa = a.$$.ptr; const cnta = a.$$.count.value;
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console.log('FREE3 node pre-del: ptr=' + pa + ' count=' + cnta + ' smart=' + (!!a.$$.smartPtr) + ' preserve=' + (!!a.$$.preservePointerOnDelete));
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a.delete();
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console.log('FREE3 node post-del: ptr=' + a.$$.ptr + ' smartPtr=' + a.$$.smartPtr);
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let c3 = new oc.gp_Pnt_1(); const pc3 = c3.$$.ptr; c3.delete();
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console.log('FREE3 after-node ctor: ptr=' + pc3 + ' reusedNodeChunk=' + (pc3 === pa));
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// second method return immediately after deleting the first
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let b1 = T.Node(1); const pb1 = b1.$$.ptr; b1.delete();
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let b2 = T.Node(1); const pb2 = b2.$$.ptr; b2.delete();
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console.log('FREE3 node-node: ptr1=' + pb1 + ' ptr2=' + pb2 + ' reused=' + (pb1 === pb2));
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Box(1,1,1);
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`;
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async function main() {
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const browser = await chromium.launch({ headless: !process.env.CS_TEST_HEADFUL,
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args: ['--use-gl=angle', '--use-angle=swiftshader'] });
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const page = await (await browser.newContext()).newPage();
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page.on('pageerror', (e) => console.log('pageerror: ' + String(e).slice(0, 300)));
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const seen = new Set();
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page.on('console', (m) => { const t = m.text(); if (t.includes('FREE3') && !seen.has(t)) { seen.add(t); console.log(t); } });
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await page.goto(`http://localhost:${PORT}/?mode=cascadestudio`, { timeout: 60000 });
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await page.waitForFunction(() => window.CascadeAPI && window.CascadeAPI.isReady(), undefined, { timeout: 120000 });
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 300000 });
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await page.evaluate((c) => window.CascadeAPI.runCode(c), CODE);
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 600000 });
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await new Promise((r) => setTimeout(r, 1500));
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await browser.close();
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}
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main().catch((e) => { console.error(e); process.exit(1); });

‎experiments/heavy-memory/probe-free4.mjs‎

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// probe-free4.mjs — read heap bytes at the chunk before/after delete()
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import { chromium } from 'playwright';
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const PORT = process.env.CS_TEST_PORT || '8452';
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const CODE = `
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let oc = self.oc;
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let t = Text3D("CascadeStudio0", 40, 8);
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let mesher = new oc.BRepMesh_IncrementalMesh_2(t, 0.1, false, 0.5, false);
8+
mesher.delete();
9+
let face0 = null, loc = new oc.TopLoc_Location_1();
10+
self.ForEachFace(t, (i, f) => { if (!face0) { face0 = f; } });
11+
let myT = oc.BRep_Tool.Triangulation(face0, loc, 0);
12+
let T = myT.get();
13+
const words = (ptr, n) => Array.from(new Uint32Array(self.ocMemory.buffer, ptr - 8, n)).join(',');
14+
// ctor case
15+
let c = new oc.gp_Pnt_1(); const pc = c.$$.ptr;
16+
const preC = words(pc, 8); c.delete(); const postC = words(pc, 8);
17+
console.log('FREE4 ctor ptr=' + pc + ' pre=[' + preC + '] post=[' + postC + '] changed=' + (preC !== postC));
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// method-return case
19+
let a = T.Node(1); const pa = a.$$.ptr;
20+
const preA = words(pa, 8); a.delete(); const postA = words(pa, 8);
21+
console.log('FREE4 node ptr=' + pa + ' pre=[' + preA + '] post=[' + postA + '] changed=' + (preA !== postA));
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Box(1,1,1);
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`;
24+
async function main() {
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const browser = await chromium.launch({ headless: !process.env.CS_TEST_HEADFUL,
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args: ['--use-gl=angle', '--use-angle=swiftshader'] });
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const page = await (await browser.newContext()).newPage();
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page.on('pageerror', (e) => console.log('pageerror: ' + String(e).slice(0, 300)));
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const seen = new Set();
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page.on('console', (m) => { const t = m.text(); if (t.includes('FREE4') && !seen.has(t)) { seen.add(t); console.log(t); } });
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await page.goto(`http://localhost:${PORT}/?mode=cascadestudio`, { timeout: 60000 });
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await page.waitForFunction(() => window.CascadeAPI && window.CascadeAPI.isReady(), undefined, { timeout: 120000 });
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 300000 });
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await page.evaluate((c) => window.CascadeAPI.runCode(c), CODE);
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 600000 });
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await new Promise((r) => setTimeout(r, 1500));
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await browser.close();
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}
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main().catch((e) => { console.error(e); process.exit(1); });

‎experiments/heavy-memory/probe-free5.mjs‎

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// probe-free5.mjs — compare ptrType/rawDestructor between ctor and method-return handles
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import { chromium } from 'playwright';
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const PORT = process.env.CS_TEST_PORT || '8452';
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const CODE = `
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let oc = self.oc;
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let t = Text3D("CascadeStudio0", 40, 8);
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let mesher = new oc.BRepMesh_IncrementalMesh_2(t, 0.1, false, 0.5, false);
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mesher.delete();
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let face0 = null, loc = new oc.TopLoc_Location_1();
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self.ForEachFace(t, (i, f) => { if (!face0) { face0 = f; } });
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let myT = oc.BRep_Tool.Triangulation(face0, loc, 0);
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let T = myT.get();
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const words = (ptr) => Array.from(new Uint32Array(self.ocMemory.buffer, ptr - 8, 4)).join(',');
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let c = new oc.gp_Pnt_1();
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let a = T.Node(1);
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console.log('FREE5 ctor ptrType.name=' + c.$$.ptrType.name + ' | node ptrType.name=' + a.$$.ptrType.name);
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console.log('FREE5 sameRegisteredClass=' + (c.$$.ptrType.registeredClass === a.$$.ptrType.registeredClass) +
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' samePtrType=' + (c.$$.ptrType === a.$$.ptrType));
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console.log('FREE5 ctor destructorFunction=' + typeof c.$$.ptrType.destructorFunction +
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' node destructorFunction=' + typeof a.$$.ptrType.destructorFunction);
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console.log('FREE5 rawDestructor typeof=' + typeof a.$$.ptrType.registeredClass.rawDestructor);
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// manual rawDestructor on the node object's ptr
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const pa = a.$$.ptr;
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const pre = words(pa);
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try { a.$$.ptrType.registeredClass.rawDestructor(pa); } catch (e) { console.log('FREE5 manual rawDestructor threw: ' + e); }
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const post = words(pa);
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console.log('FREE5 manual-destroy pre=[' + pre + '] post=[' + post + '] changed=' + (pre !== post));
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c.delete();
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Box(1,1,1);
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`;
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async function main() {
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const browser = await chromium.launch({ headless: !process.env.CS_TEST_HEADFUL,
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args: ['--use-gl=angle', '--use-angle=swiftshader'] });
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const page = await (await browser.newContext()).newPage();
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page.on('pageerror', (e) => console.log('pageerror: ' + String(e).slice(0, 300)));
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const seen = new Set();
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page.on('console', (m) => { const t = m.text(); if (t.includes('FREE5') && !seen.has(t)) { seen.add(t); console.log(t); } });
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await page.goto(`http://localhost:${PORT}/?mode=cascadestudio`, { timeout: 60000 });
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await page.waitForFunction(() => window.CascadeAPI && window.CascadeAPI.isReady(), undefined, { timeout: 120000 });
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 300000 });
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await page.evaluate((c) => window.CascadeAPI.runCode(c), CODE);
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await page.waitForFunction(() => !window.CascadeAPI.isWorking(), undefined, { timeout: 600000 });
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await new Promise((r) => setTimeout(r, 1500));
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await browser.close();
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}
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main().catch((e) => { console.error(e); process.exit(1); });

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