Using `reduce` to remove extra iterations (#2122)

* Using `reduce` to not iterate so much

* Remove the Array.from as well

src/drivers/npm/driver.js

@@ -133,11 +133,17 @@ class Driver {
         js
       })
         .then(() => {
-          const links = Array.from(browser.document.getElementsByTagName('a'))
+          const links = Array.prototype.reduce.call(
-            .filter(link => link.protocol === 'http:' || link.protocol === 'https:')
+            browser.document.getElementsByTagName('a'),
-            .filter(link => link.hostname === this.origPageUrl.hostname)
+            (acc, link) => {
-            .filter(link => extensions.test(link.pathname))
+              if (link.protocol.match(/https?:/) || link.hostname === this.origPageUrl.hostname || extensions.test(link.pathname)) {
-            .map(link => { link.hash = ''; return url.parse(link.href) });
+                link.hash = '';
+                acc.push(url.parse(link.href));
+              }
+              return acc;
+            },
+            []
+          );
 
           return resolve(links);
         });