Docs: Update benchmark for stealth/union-alpha EFF:high

Added new models to the benchmark run section.

README

@@ -9,6 +9,7 @@ SHARED_PROMPT: "Provide production-ready and maintainable JavaScript code. Apply
 The following models are included in the benchmark run.
 
 <!-- MODELS_START -->
+stealth/union-alpha EFF:high
 google/gemini-3.8-flash EFF:high
 google/gemini-3.7-flash EFF:high
 moonshotai/kimi-k3 EFF:medium

tests/10_scrypt_hash/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,9 @@
+async function hashPassword(password, salt) {
+  const { scrypt } = await import('https://cdn.jsdelivr.net/npm/scrypt-js@3.0.1/+esm');
+  const enc = new TextEncoder();
+  const hash = await scrypt(enc.encode(password), enc.encode(salt), 1024, 8, 1, 32);
+  return Array.from(hash, b => b.toString(16).padStart(2, '0')).join('');
+}
+export default hashPassword;
+// Generation time: 98.298s
+// Result: PASS

tests/11_geospatial/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,16 @@
+async function analyzeGPS(readings, boundary) {
+  const { booleanPointInPolygon, lineString, length } =
+    await import("https://cdn.jsdelivr.net/npm/@turf/turf@7.2.0/+esm");
+
+  const points = readings
+    .filter(({ loc }) => booleanPointInPolygon(loc, boundary, { ignoreBoundary: true }))
+    .sort((a, b) => a.ts - b.ts)
+    .map(({ loc }) => loc);
+
+  return points.length < 2
+    ? 0
+    : +length(lineString(points), { units: "kilometers" }).toFixed(2);
+}
+export default analyzeGPS;
+// Generation time: 53.787s
+// Result: PASS

tests/12_mst_pipeline/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,84 @@
+async function computeMST(toml) {
+  if (typeof toml !== "string")
+    throw new TypeError("Expected a TOML string.");
+
+  const [{ parse }, { default: Heap }, { default: textTable }] =
+    await Promise.all([
+      import("https://esm.sh/smol-toml@1.3.1"),
+      import("https://esm.sh/mnemonist@0.39.8/heap.js"),
+      import("https://esm.sh/text-table@0.2.0")
+    ]);
+
+  const { edges } = parse(toml);
+  if (!Array.isArray(edges))
+    throw new TypeError('Expected an "edges" array.');
+
+  const parent = new Map(), rank = new Map();
+  const heap = new Heap((a, b) => a.weight - b.weight || a.index - b.index);
+
+  for (const [index, edge] of edges.entries()) {
+    if (
+      !edge ||
+      typeof edge.from !== "string" ||
+      typeof edge.to !== "string" ||
+      !Number.isFinite(edge.weight)
+    )
+      throw new TypeError(
+        `Invalid edge at index ${index}: expected string endpoints and a finite numeric weight.`
+      );
+
+    const { from, to, weight } = edge;
+    heap.push({ from, to, weight, index });
+
+    for (const node of [from, to]) {
+      if (parent.has(node)) continue;
+      parent.set(node, node);
+      rank.set(node, 0);
+    }
+  }
+
+  function find(node) {
+    while (node !== parent.get(node)) {
+      parent.set(node, parent.get(parent.get(node)));
+      node = parent.get(node);
+    }
+    return node;
+  }
+
+  function union(a, b) {
+    a = find(a);
+    b = find(b);
+    if (a === b) return false;
+    if (rank.get(a) < rank.get(b)) [a, b] = [b, a];
+
+    parent.set(b, a);
+    if (rank.get(a) === rank.get(b))
+      rank.set(a, rank.get(a) + 1);
+
+    return true;
+  }
+
+  const mst = [];
+  let totalWeight = 0;
+
+  while (heap.size && mst.length < parent.size - 1) {
+    const { from, to, weight } = heap.pop();
+    if (!union(from, to)) continue;
+
+    mst.push([from, to, String(weight)]);
+    totalWeight += weight;
+    if (!Number.isFinite(totalWeight))
+      throw new RangeError("Total weight exceeds the finite Number range.");
+  }
+
+  return {
+    table: textTable(
+      [["From", "To", "Weight"], ...mst],
+      { align: ["l", "l", "r"] }
+    ),
+    totalWeight
+  };
+}
+export default computeMST;
+// Generation time: 147.182s
+// Result: PASS

tests/1_dijkstra/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,38 @@
+async function findShortestPath(graph, start, end) {
+  for (const edges of Object.values(graph))
+    for (const weight of Object.values(edges))
+      if (!Number.isFinite(weight) || weight < 0)
+        throw new RangeError("Edge weights must be finite, nonnegative numbers.");
+
+  if (!Object.hasOwn(graph, start) || !Object.hasOwn(graph, end))
+    return Infinity;
+  if (start === end) return 0;
+
+  const { default: PriorityQueue } = await import(
+    "https://esm.sh/js-priority-queue@0.1.5"
+  );
+  const queue = new PriorityQueue({ comparator: (a, b) => a[1] - b[1] });
+  const distances = new Map([[start, 0]]);
+
+  queue.queue([start, 0]);
+
+  while (queue.length) {
+    const [node, distance] = queue.dequeue();
+
+    if (distance !== distances.get(node)) continue;
+    if (node === end) return distance;
+
+    for (const [neighbor, weight] of Object.entries(graph[node] ?? {})) {
+      const next = distance + weight;
+
+      if (next >= (distances.get(neighbor) ?? Infinity)) continue;
+      distances.set(neighbor, next);
+      queue.queue([neighbor, next]);
+    }
+  }
+
+  return Infinity;
+}
+export default findShortestPath;
+// Generation time: 66.902s
+// Result: PASS

tests/2_convex_hull/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,38 @@
+async function findConvexHull(points) {
+  if (!Array.isArray(points) || points.some(
+    p => !p || !Number.isFinite(p.x) || !Number.isFinite(p.y)
+  )) {
+    throw new TypeError("Expected an array of points with finite numeric x and y.");
+  }
+
+  const { default: _ } = await import(
+    "https://cdn.jsdelivr.net/npm/lodash@4.17.21/+esm"
+  );
+  const sorted = _.sortBy(
+    _.uniqBy(points, p => JSON.stringify([p.x, p.y])),
+    ["x", "y"]
+  );
+
+  if (sorted.length < 3) return sorted;
+
+  const cross = (a, b, c) =>
+    (b.x - a.x) * (c.y - a.y) - (b.y - a.y) * (c.x - a.x);
+
+  const build = list => {
+    const hull = [];
+    for (const p of list) {
+      while (
+        hull.length > 1 &&
+        cross(hull[hull.length - 2], hull[hull.length - 1], p) <= 0
+      ) hull.pop();
+      hull.push(p);
+    }
+    hull.pop();
+    return hull;
+  };
+
+  return [...build(sorted), ...build([...sorted].reverse())];
+}
+export default findConvexHull;
+// Generation time: 113.790s
+// Result: PASS

tests/3_signal_pipeline/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,100 @@
+async function analyzeSignal(yamlString) {
+  if (typeof yamlString !== "string")
+    throw new TypeError("Expected a YAML string.");
+
+  const [yaml, math, { default: ndarray }, { default: fft }, { default: DOMPurify }] =
+    await Promise.all([
+      import("https://esm.sh/js-yaml@4.1.1"),
+      import("https://esm.sh/mathjs@14.8.1"),
+      import("https://esm.sh/ndarray@1.0.19?bundle"),
+      import("https://esm.sh/ndarray-fft@1.0.3?bundle"),
+      import("https://esm.sh/dompurify@3.3.1")
+    ]);
+
+  if (!DOMPurify.isSupported)
+    throw new Error("HTML sanitization is unavailable in this browser.");
+
+  const config = yaml.load(yamlString, { schema: yaml.JSON_SCHEMA });
+
+  if (!config || typeof config !== "object" || Array.isArray(config))
+    throw new TypeError("Configuration must be a YAML mapping.");
+
+  const { sampleRate, duration, components } = config;
+
+  if (![sampleRate, duration].every(v => Number.isFinite(v) && v > 0))
+    throw new RangeError("sampleRate and duration must be positive finite numbers.");
+
+  if (
+    !Array.isArray(components) ||
+    components.some(c =>
+      !c || !Number.isFinite(c.frequency) || !Number.isFinite(c.amplitude)
+    )
+  )
+    throw new TypeError("components must contain finite frequency and amplitude values.");
+
+  const N = sampleRate * duration;
+
+  if (!Number.isSafeInteger(N) || N < 1)
+    throw new RangeError("sampleRate * duration must be a positive safe integer.");
+
+  const signal = new Float64Array(N);
+  const tau = 2 * math.pi;
+
+  for (let i = 0; i < N; i++) {
+    const t = i / sampleRate;
+    let value = 0;
+
+    for (const { frequency, amplitude } of components)
+      value += amplitude * math.sin(tau * frequency * t);
+
+    if (!Number.isFinite(value))
+      throw new RangeError(`Signal computation overflowed at sample ${i}.`);
+
+    signal[i] = value;
+  }
+
+  const real = ndarray(signal, [N]);
+  const imag = ndarray(new Float64Array(N), [N]);
+
+  fft(1, real, imag);
+
+  const spectrum = new Float64Array(Math.floor(N / 2) + 1);
+  const candidates = [];
+
+  for (let k = 0; k < spectrum.length; k++) {
+    const magnitude = math.sqrt(real.get(k) ** 2 + imag.get(k) ** 2) / (N / 2);
+
+    if (!Number.isFinite(magnitude))
+      throw new RangeError(`Spectrum computation overflowed at bin ${k}.`);
+
+    spectrum[k] = magnitude;
+
+    if (magnitude > 0.1)
+      candidates.push({ frequencyHz: k * sampleRate / N, magnitude });
+  }
+
+  const peaks = candidates
+    .sort((a, b) => b.magnitude - a.magnitude)
+    .map(({ frequencyHz, magnitude }) => ({
+      frequencyHz: Math.round(frequencyHz),
+      magnitude: Number(magnitude.toFixed(2))
+    }));
+
+  const table =
+    "<table><tr><th>Frequency (Hz)</th><th>Magnitude</th></tr>" +
+    peaks.map(({ frequencyHz, magnitude }) =>
+      `<tr><td>${frequencyHz}</td><td>${magnitude.toFixed(2)}</td></tr>`
+    ).join("") +
+    "</table>";
+
+  const html = DOMPurify.sanitize(table, {
+    ALLOWED_TAGS: ["table", "tbody", "tr", "th", "td"],
+    ALLOWED_ATTR: [],
+    RETURN_TRUSTED_TYPE: false
+  });
+
+  return { peaks, html, signalLength: N };
+}
+export default analyzeSignal;
+// Generation time: 203.858s
+// Result: PASS

tests/4_hexchain_pipeline/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,43 @@
+async function hexchain(toml) {
+  const { parse } = await import('https://cdn.jsdelivr.net/npm/smol-toml@1.0.1/+esm');
+  const config = parse(toml);
+  const Ajv = (await import('https://cdn.jsdelivr.net/npm/ajv@8.12.0/+esm')).default;
+  const ajv = new Ajv();
+  const schema = {
+    type: 'object',
+    required: ['seed', 'count', 'label'],
+    properties: {
+      seed: { type: 'string' },
+      count: { type: 'integer', minimum: 1, maximum: 10000 },
+      label: { type: 'string', minLength: 1 }
+    }
+  };
+  if (!ajv.validate(schema, config)) return { valid: false, errors: ajv.errorsText() };
+  const seedrandom = (await import('https://cdn.jsdelivr.net/npm/seedrandom@3.0.5/+esm')).default;
+  const rng = new seedrandom(config.seed);
+  const nums = Array.from({ length: config.count }, () => rng());
+  const { mean, standardDeviation, median } = await import('https://cdn.jsdelivr.net/npm/simple-statistics@7.8.3/+esm');
+  const stats = {
+    mean: +mean(nums).toFixed(6),
+    stddev: +standardDeviation(nums).toFixed(6),
+    median: +median(nums).toFixed(6)
+  };
+  const table = (await import('https://cdn.jsdelivr.net/npm/text-table@0.2.0/+esm')).default;
+  const tableString = table([
+    ['Stat', 'Value'],
+    ['mean', String(stats.mean)],
+    ['stddev', String(stats.stddev)],
+    ['median', String(stats.median)]
+  ]);
+  const DOMPurify = (await import('https://cdn.jsdelivr.net/npm/dompurify@3.0.6/+esm')).default;
+  return {
+    valid: true,
+    label: config.label,
+    stats,
+    table: DOMPurify.sanitize('<pre class="stats">' + tableString + '</pre>'),
+    count: config.count
+  };
+}
+export default hexchain;
+// Generation time: 164.666s
+// Result: PASS

tests/5_markdown_parser/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,11 @@
+let loader;
+
+export async function parseMarkdown(markdown) {
+  loader ||= import('https://esm.sh/marked@12').then((m) => m.marked);
+  const marked = await loader;
+  const source = typeof markdown === 'string' ? markdown : '';
+  return marked.parse(source, { gfm: true, breaks: false });
+}
+export default parseMarkdown;
+// Generation time: 59.989s
+// Result: PASS

tests/6_csv_processor/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,36 @@
+async function processCSV(csv, { filterColumn, filterValue, groupBy, aggregateColumn, operation }) {
+    const { default: Papa } = await import('https://cdn.jsdelivr.net/npm/papaparse@5.4.1/papaparse.min.js');
+    const { default: _ } = await import('https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js');
+
+    const parsed = Papa.parse(csv, { header: true, skipEmptyLines: true });
+    const data = parsed.data;
+
+    const filtered = data.filter(row => row[filterColumn] == filterValue);
+
+    const grouped = _.groupBy(filtered, groupBy);
+
+    const results = Object.keys(grouped).map(groupVal => {
+        const rows = grouped[groupVal];
+        const nums = rows.map(r => {
+            const val = Number(r[aggregateColumn]);
+            return isNaN(val) ? 0 : val;
+        });
+
+        let result;
+        if (operation === 'sum') {
+            result = nums.reduce((a, b) => a + b, 0);
+        } else if (operation === 'avg') {
+            const sum = nums.reduce((a, b) => a + b, 0);
+            result = sum / nums.length;
+        } else if (operation === 'count') {
+            result = nums.length;
+        }
+
+        return { [groupBy]: groupVal, result };
+    });
+
+    return results;
+}
+export default processCSV;
+// Generation time: 72.324s
+// Result: FAIL

tests/7_scheduler/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,49 @@
+async function findAvailableSlots(cal1, cal2, constraints) {
+  const { DateTime } = await import('https://esm.sh/luxon@3.4.4');
+  const { durationMinutes, searchRange, workHours } = constraints;
+  const s = DateTime.fromISO(searchRange.start, { zone: 'utc' });
+  const e = DateTime.fromISO(searchRange.end, { zone: 'utc' });
+  const dur = { minutes: durationMinutes };
+  const busy = [...cal1, ...cal2]
+    .map(x => [DateTime.fromISO(x.start, { zone: 'utc' }), DateTime.fromISO(x.end, { zone: 'utc' })])
+    .filter(([a, b]) => b > s && a < e)
+    .map(([a, b]) => [a < s ? s : a, b > e ? e : b])
+    .sort((a, b) => a[0] - b[0]);
+  const merged = [];
+  for (const [a, b] of busy) {
+    const last = merged[merged.length - 1];
+    if (!last || a > last[1]) merged.push([a, b]);
+    else if (b > last[1]) last[1] = b;
+  }
+  const [wsh, wsm] = workHours.start.split(':').map(Number);
+  const [weh, wem] = workHours.end.split(':').map(Number);
+  const slots = [];
+  for (let day = s.startOf('day'); day <= e; day = day.plus({ days: 1 })) {
+    const ws = day.set({ hour: wsh, minute: wsm, second: 0, millisecond: 0 });
+    const we = day.set({ hour: weh, minute: wem, second: 0, millisecond: 0 });
+    const winS = ws < s ? s : ws;
+    const winE = we > e ? e : we;
+    if (winS >= winE) continue;
+    let cur = winS;
+    for (const [a, b] of merged) {
+      if (b <= cur) continue;
+      if (a >= winE) break;
+      if (a > cur) add(cur, a < winE ? a : winE);
+      if (b > cur) cur = b > winE ? winE : b;
+      if (cur >= winE) break;
+    }
+    if (cur < winE) add(cur, winE);
+  }
+  function add(a, b) {
+    let t = a;
+    while (t.plus(dur) <= b) {
+      const n = t.plus(dur);
+      slots.push({ start: t.toUTC().toISO(), end: n.toUTC().toISO() });
+      t = n;
+    }
+  }
+  return slots;
+}
+export default findAvailableSlots;
+// Generation time: 191.955s
+// Result: PASS

tests/8_json_validator/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,29 @@
+async function validateJSON(data, schema) {
+  if (!schema || typeof schema !== "object" || Array.isArray(schema))
+    throw new TypeError("Schema must be a JSON Schema object.");
+
+  const [{ default: Ajv }, { default: addFormats }] = await Promise.all([
+    import("https://esm.sh/ajv@8.17.1"),
+    import("https://esm.sh/ajv-formats@3.0.1?deps=ajv@8.17.1")
+  ]);
+
+  const ajv = new Ajv({ allErrors: true, strict: false });
+  addFormats(ajv);
+
+  const validate = ajv.compile(schema);
+  if (validate.$async)
+    throw new TypeError("Asynchronous schema extensions are not supported.");
+
+  const valid = validate(data);
+  return {
+    valid,
+    errors: valid
+      ? []
+      : (validate.errors ?? []).map(
+          ({ instancePath, message }) => `${instancePath || "/"}: ${message}`
+        )
+  };
+}
+export default validateJSON;
+// Generation time: 99.796s
+// Result: PASS

tests/9_stream_visualizer/outputs/stealth_union-alpha EFF_high.js

@@ -0,0 +1,63 @@
+async function createStreamVisualizer(asyncIterable, options = {}) {
+  const { maxPoints, alpha, width, height, yDomain } = options;
+
+  if (typeof asyncIterable?.[Symbol.asyncIterator] !== "function")
+    throw new TypeError("Expected an async iterable.");
+
+  if (!Number.isSafeInteger(maxPoints) || maxPoints < 1)
+    throw new RangeError("maxPoints must be a positive safe integer.");
+
+  if (!Number.isFinite(alpha) || alpha < 0 || alpha > 1)
+    throw new RangeError("alpha must be between 0 and 1.");
+
+  if (![width, height].every(n => Number.isFinite(n) && n >= 0))
+    throw new RangeError("width and height must be finite and nonnegative.");
+
+  if (
+    !Array.isArray(yDomain) ||
+    yDomain.length !== 2 ||
+    !yDomain.every(Number.isFinite) ||
+    yDomain[0] >= yDomain[1]
+  )
+    throw new RangeError("yDomain must contain two increasing finite numbers.");
+
+  const domain = [...yDomain];
+  const d3 = await import("https://cdn.jsdelivr.net/npm/d3@7.9.0/+esm");
+  const buffer = [];
+  let cursor = 0, ema;
+
+  for await (const point of asyncIterable) {
+    const { timestamp, value } = point ?? {};
+    const time = timestamp instanceof Date ? timestamp.getTime() : timestamp;
+
+    if (!Number.isFinite(time) || !Number.isFinite(value))
+      throw new TypeError("Each point needs a valid timestamp and finite value.");
+
+    ema = ema === undefined ? value : alpha * value + (1 - alpha) * ema;
+    buffer[cursor] = { timestamp: time, value, ema };
+    cursor = (cursor + 1) % maxPoints;
+  }
+
+  const data = buffer.length === maxPoints
+    ? buffer.slice(cursor).concat(buffer.slice(0, cursor))
+    : buffer;
+
+  if (!data.length) return { data, path: "" };
+
+  const x = d3.scaleLinear()
+    .domain([data[0].timestamp, data[data.length - 1].timestamp])
+    .range([0, width]);
+
+  const y = d3.scaleLinear()
+    .domain(domain)
+    .range([height, 0]);
+
+  const path = d3.line()
+    .x(d => x(d.timestamp))
+    .y(d => y(d.ema))(data) ?? "";
+
+  return { data, path };
+}
+export default createStreamVisualizer;
+// Generation time: 101.222s
+// Result: PASS