benchmark filter operator

Author: martinsik

benchmark/filter/filter.php

@@ -0,0 +1,11 @@
+<?php
+
+use Rx\Observable;
+
+return function() use ($dummyObserver) {
+    Observable::range(1, pow(10, 3))
+        ->filter(function($value) {
+            return $value % 2 == 0;
+        })
+        ->subscribe($dummyObserver);
+};