diff --git a/perf/micro/immediate-scheduler/operators/buffertime.js b/perf/micro/immediate-scheduler/operators/buffertime.js
new file mode 100644
index 0000000000..584cc58798
--- /dev/null
+++ b/perf/micro/immediate-scheduler/operators/buffertime.js
@@ -0,0 +1,18 @@
+var RxOld = require('rx');
+var RxNew = require('../../../../index');
+
+module.exports = function (suite) {
+  var oldBufferWithImmediateScheduler = RxOld.Observable.interval(25, RxOld.Scheduler.immediate).bufferWithTime(60, RxOld.Scheduler.immediate).take(3);
+  var newBufferWithImmediateScheduler = RxNew.Observable.interval(25).bufferTime(60).take(3);
+
+  function _next(x) { }
+  function _error(e) { }
+  function _complete() { }
+  return suite
+      .add('old bufferTime() with immediate scheduler', function () {
+        oldBufferWithImmediateScheduler.subscribe(_next, _error, _complete);
+      })
+      .add('new bufferTime() with immediate scheduler', function () {
+        newBufferWithImmediateScheduler.subscribe(_next, _error, _complete);
+      });
+};
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