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node_modules/epoll/test/brute-force-leak-check.js

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+'use strict';
+
+/*
+ * Create 1e9 epoll instances and use each of them to detect a single event.
+ * The goal here is ensure that memory usage doesn't constantly increase over
+ * time.
+ *
+ * This test expects a newline as input on stdin. It polls for events on stdin
+ * but doesn't read stdin until it has been notified about the availability of
+ * input data 1e9 times.
+ */
+var Epoll = require('../build/Release/epoll').Epoll,
+  util = require('./util'),
+  count = 0,
+  stdin = 0; // fd for stdin
+
+function once() {
+  var epoll = new Epoll(function (err, fd, events) {
+    epoll.remove(fd).close();
+
+    count += 1;
+
+    if (count % 1e5 === 0) {
+      console.log('           ' + count + ' instances created and events detected ');
+    }
+    if (count < 1e9) {
+      once();
+    } else {
+      util.read(fd); // read stdin (the newline)
+    }
+  });
+
+  epoll.add(stdin, Epoll.EPOLLIN);
+}
+
+once();
+