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How to improve website performance with Sitespeed.io

Speed Matters


Before coming to how, let’s talk about why focusing on your website performance is the single most important thing. Do you know that 79% of the online shoppers who had trouble with the website performance say that they never returned to that website? A one second delay in page response on an ecommerce website results in 7% reduction in conversions. Website performance plays a crucial role in customer experience & satisfaction. Let’s consider a scenario where you are shopping online on a website that is taking forever to load. Obviously it’s frustrating and you will lose your interest quickly . That’s exactly what users browsing your services / products feel if you haven’t considered improving your website performance.

How can Sitespeed help?

There are many tools in the market to analyze and suggest the steps to improve the website performance. Some of them are GTmetrix, webpagetest, webmaster tools etc.

I personally prefer speedsite.io as it offers additional controls such as-

  1. Crawls many web pages and generate customizable performance reports.
  2. Most tools allow you to test pages that are online only. Sitespeed.io provides the enhanced functionality to test the performance of your local websites at each stage of the build.
  3. Continuous integration with Jenkins.
  4. Testing the website against web performance best practices.
  5. Testing both desktop and mobile sites.
  6. The best part – It’s an open source tool & absolutely free

Now before you can use Sitespeed.io, you will need to install it. For detailed documentation on how to install and for pre-requisites please go through – https://www.sitespeed.io/documentation/

Once sitespeed.io is installed, test it using below command. You can use any hosted site or local site which is accessible through the browser.

$bin/sitespeed.js http://www.example.com

Once you enter the command, you will see the following screen

Sitespeed command

The results are stored in “sitespeed-result” folder.

Sitespeed Result

Open index.html to browse through end results. The end results will look like the screenshot attached below. This screenshot is for your reference only.

Analyzed Report

You can run sitespeed tool with many other options which are highly configurable. Visit below link to get a better understanding of the options provided.


The reason I recommend sitespeed.io is essentially because of its simplicity. Once installed all you need to do is run it on your command line. So go ahead, make that cup of coffee because once you are back you will have a detailed results page waiting for you to peruse offline at your leisure. It’s that simple and easy!


Great tips. Content delivery network (CDN) is necessary to reduced load speed of a website and the rest you can optimise using htaccess. We brought our site load speed to 0.4 sec without using any plugins and external tools.

Hi Neeraj,
Thank you very much for sharing these tips, keep sharing!

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