A server with configurable lag for testing

benchmark/http_server_lag.js

@@ -0,0 +1,13 @@
+var http = require('http');
+var port = parseInt(process.env.PORT, 10) || 8000;
+var defaultLag = parseInt(process.argv[2], 10) || 100;
+
+http.createServer(function(req, res) {
+  res.writeHead(200, { 'content-type': 'text/plain',
+                       'content-lengt': '2' });
+
+  var lag = parseInt(req.url.split("/").pop(), 10) || defaultLag;
+  setTimeout(function() {
+    res.end('ok');
+  }, lag);
+}).listen(port, 'localhost');