url: add benchmark to check impact of searchParams checking

benchmark/url/url-searchparams-update.js

@@ -0,0 +1,23 @@
+'use strict';
+const common = require('../common.js');
+
+const bench = common.createBenchmark(main, {
+  searchParams: ['true', 'false'],
+  property: ['pathname', 'search'],
+  n: [1e6],
+});
+
+function main({ searchParams, property, n }) {
+  const url = new URL('https://nodejs.org');
+  if (searchParams === 'true') url.searchParams;
+
+  const method = property === 'pathname' ?
+    (n => url.pathname = `/${n}`) :
+    (n => url.search = `?${n}`);
+
+  bench.start();
+  for (let i = 0; i < n; i++) {
+    method(n);
+  }
+  bench.end(n);
+}