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node_modules/epoll/test/performance-check.js

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+'use strict';
+
+/*
+ * Determine approximately how many EPOLLIN events can be handled per second.
+ *
+ * This test expects a newline as input on stdin. It polls for events on stdin
+ * but doesn't read stdin until the test has completed. This results in a
+ * continuous stream of events while the test is running.
+ *
+ * Note that the rate determined is misleading as epoll is notifying us about
+ * the same newline all the time.
+ *
+ * The newline should be piped in for reasonable results:
+ * echo | node performance-check
+ */
+var Epoll = require('../build/Release/epoll').Epoll,
+  util = require('./util'),
+  time,
+  count = 0,
+  stdin = 0; // fd for stdin
+
+var epoll = new Epoll(function (err, fd, events) {
+  count += 1;
+});
+
+setTimeout(function () {
+  var rate;
+
+  time = process.hrtime(time);
+  rate = Math.floor(count / (time[0] + time[1] / 1E9));
+  console.log('           ' + rate + ' events per second');
+
+  epoll.remove(stdin).close();
+  util.read(stdin); // read stdin (the newline)
+}, 100);
+
+epoll.add(stdin, Epoll.EPOLLIN);
+time = process.hrtime();
+