[benchmark] Add Unix domain sockets to bench (#1456)

bench/speed.js

@@ -1,24 +1,33 @@
 'use strict';
 
 const cluster = require('cluster');
+const http = require('http');
 
 const WebSocket = require('..');
 
 const port = 8181;
+const path = '';
+// const path = '/tmp/wss.sock';
 
 if (cluster.isMaster) {
+  const server = http.createServer();
   const wss = new WebSocket.Server({
     maxPayload: 600 * 1024 * 1024,
     perMessageDeflate: false,
     clientTracking: false,
-    port
-  }, () => cluster.fork());
+    server
+  });
 
   wss.on('connection', (ws) => {
     ws.on('message', (data) => ws.send(data));
   });
 
-  cluster.on('exit', () => wss.close());
+  server.listen(path ? { path } : { port }, () => cluster.fork());
+
+  cluster.on('exit', () => {
+    wss.close();
+    server.close();
+  });
 } else {
   const configs = [
     [true, 10000, 64],
@@ -52,9 +61,12 @@ if (cluster.isMaster) {
     randomBytes[i] = ~~(Math.random() * 127);
   }
 
+  console.log(`Testing ws on ${path || '[::]:' + port}`);
+
   const runConfig = (useBinary, roundtrips, size, cb) => {
     const data = randomBytes.slice(0, size);
-    const ws = new WebSocket(`ws://localhost:${port}`, {
+    const url = path ? `ws+unix://${path}` : `ws://localhost:${port}`;
+    const ws = new WebSocket(url, {
       maxPayload: 600 * 1024 * 1024
     });
     var roundtrip = 0;