benchmark: add url.domainTo*()

PR-URL: #11464
Reviewed-By: Steven R Loomis <srloomis@us.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>

benchmark/url/whatwg-url-idna.js

@@ -0,0 +1,47 @@
+'use strict';
+const common = require('../common.js');
+const { domainToASCII, domainToUnicode } = require('url');
+
+const inputs = {
+  empty: {
+    ascii: '',
+    unicode: ''
+  },
+  none: {
+    ascii: 'passports',
+    unicode: 'passports'
+  },
+  some: {
+    ascii: 'Paßstraße',
+    unicode: 'xn--Pastrae-1vae'
+  },
+  all: {
+    ascii: '他们不说中文',
+    unicode: 'xn--ihqwczyycu19kkg2c'
+  },
+  nonstring: {
+    ascii: { toString() { return ''; } },
+    unicode: { toString() { return ''; } }
+  }
+};
+
+const bench = common.createBenchmark(main, {
+  input: Object.keys(inputs),
+  to: ['ascii', 'unicode'],
+  n: [5e6]
+});
+
+function main(conf) {
+  const n = conf.n | 0;
+  const to = conf.to;
+  const input = inputs[conf.input][to];
+  const method = to === 'ascii' ? domainToASCII : domainToUnicode;
+
+  common.v8ForceOptimization(method, input);
+
+  bench.start();
+  for (var i = 0; i < n; i++) {
+    method(input);
+  }
+  bench.end(n);
+}