map-get-value.js - mozsearch

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// Return a new map, possibly filling some dummy entries to enforce creating

// multiple hash buckets.

function createMap(values, n) {

  var xs = [...values];

  for (var i = 0; i < n; ++i) {

    xs.push({});

  return new Map(xs.map((x, i) => [x, i + 1]));

function runTest(fn) {

  fn(0);

  fn(100);

function testPolymorphic(n) {

  var xs = [10, 10.5, "test", Symbol("?"), 123n, -123n, {}, []];

  var ys = [-0, NaN, "bad", Symbol("!"), 42n, -99n, {}, []];

  var zs = [...xs, ...ys];

  var map = createMap(xs, n);

  var N = 128;

  var c = 0;

  for (var i = 0; i < N; ++i) {

    var z = zs[i & 15];

    var v = map.get(z);

    if (v !== undefined) c += v;

  assertEq(c, (8 * 9) / 2 * 8);

runTest(testPolymorphic);