@@ -0,0 +1,53 @@
+'use strict';
+const common = require('../common.js');
+const assert = require('assert');
+
+// Consumes a URLSearchParams iterator with builtins that have fast paths for
+// iterator result objects (Array.from, Map constructor, Object.fromEntries),
+// plus for-of for comparison.
+const bench = common.createBenchmark(main, {
+  method: ['Array.from', 'Map', 'Object.fromEntries', 'for-of'],
+  n: [1e6],
+});
+
+const str = 'one=single&two=first&three=first&two=2nd&three=2nd&three=3rd';
+
+function main({ method, n }) {
+  const params = new URLSearchParams(str);
+  let noDead;
+
+  switch (method) {
+    case 'Array.from':
+      bench.start();
+      for (let i = 0; i < n; i += 1)
+        noDead = Array.from(params);
+      bench.end(n);
+      assert.strictEqual(noDead.length, 6);
+      break;
+    case 'Map':
+      bench.start();
+      for (let i = 0; i < n; i += 1)
+        noDead = new Map(params);
+      bench.end(n);
+      assert.strictEqual(noDead.size, 3);
+      break;
+    case 'Object.fromEntries':
+      bench.start();
+      for (let i = 0; i < n; i += 1)
+        noDead = Object.fromEntries(params);
+      bench.end(n);
+      assert.strictEqual(noDead.three, '3rd');
+      break;
+    case 'for-of':
+      bench.start();
+      for (let i = 0; i < n; i += 1) {
+        for (const pair of params)
+          noDead = pair;
+      }
+      bench.end(n);
+      assert.strictEqual(noDead[1], '3rd');
+      break;
+    default:
+      throw new Error(`Unknown method ${method}`);
+  }
+}