Fix benchmark script, add isProbablyReaderable benchmark

benchmarks/benchmarks.js

@@ -1,4 +1,4 @@
-var getTestPages = require("../test/bootstrap").getTestPages;
+var getTestPages = require("../test/utils").getTestPages;
 
 var readability = require("../index.js");
 var Readability = readability.Readability;
@@ -56,3 +56,22 @@ suite("Readability test page perf", function () {
     });
   });
 });
+
+suite("isProbablyReaderable perf", function () {
+  set("iterations", 1);
+  set("type", "static");
+
+  var uri = {
+    spec: "http://fakehost/test/page.html",
+    host: "fakehost",
+    prePath: "http://fakehost",
+    scheme: "http",
+    pathBase: "http://fakehost/test"
+  };
+  testPages.forEach(function(testPage) {
+    var doc = new JSDOMParser().parse(testPage.source);
+    bench(testPage.dir + " readability perf", function() {
+      new Readability(uri, doc).isProbablyReaderable();
+    });
+  });
+});