chore: sample for multi nodes

README.md

@@ -221,7 +221,7 @@ async function foo () {
 Start autocannon against the given target.
 
 * `opts`: Configuration options for the autocannon instance. This can have the following attributes. _REQUIRED_.
-    * `url`: The given target. Can be http or https. _REQUIRED_.
+    * `url`: The given target. Can be http or https. More than one url is allowed, but it is recommended that the number of connections be an integer multiple of the url. _REQUIRED_.
     * `socketPath`: A path to a Unix Domain Socket or a Windows Named Pipe. A `url` is still required in order to send the correct Host header and path. _OPTIONAL_.
     * `connections`: The number of concurrent connections. _OPTIONAL_ default: `10`.
     * `duration`: The number of seconds to run the autocannon. Can be a [timestring](https://www.npmjs.com/package/timestring). _OPTIONAL_ default: `10`.

samples/bench-multi-url.js

@@ -0,0 +1,44 @@
+'use strict'
+
+const http = require('http')
+const autocannon = require('autocannon')
+
+function createHandler (serverName) {
+  return function (req, res) {
+    console.log(serverName + ' received request')
+    res.end('hello world')
+  }
+}
+
+const server1 = http.createServer(createHandler('server1'))
+const server2 = http.createServer(createHandler('server2'))
+
+server1.listen(0, startBench)
+server2.listen(0, startBench)
+
+function startBench () {
+  const url = [
+    'http://localhost:' + server1.address().port,
+    'http://localhost:' + server2.address().port
+  ]
+
+  // same with run the follow command in cli
+  // autocannon -d 10 -c 2 http://localhost:xxxx http://localhost:yyyy
+  autocannon({
+    url: url,
+    // connection number should n times of the number of server
+    connections: 2,
+    duration: 10,
+    requests: [
+      {
+        method: 'GET',
+        path: '/'
+      }
+    ]
+  }, finishedBench)
+
+  function finishedBench (err, res) {
+    console.log('finished bench', err, res)
+    process.exit(1)
+  }
+}