How Download Speed Can Affect Website Performance

This article explains how download speed (bandwidth) can affect website performance across a network and on a browser or user agent.

Website performance is affected by many different factors, such as network conditions, load on the server, activities on the browser and many other variable factors. As these factors vary dynamically web performance metrics can fluctuate considerably. This is especially true of network conditions which for smartphone users download speed can vary considerably from being a very fast 40+ Mbps to a very slow 2 Mbps connection. 

Download speed is measured as the number of bytes per second that is transferred from the internet to an end-user device, and in this.....

What is Web Performance Engineering

Understanding how to speed up your website to improve customer experience is now a defined skill. Welcome to web performance engineering.

The importance of how fast the company web site performs has risen substantially in recent years as business executives recognize how significant a faster web sites can contribute to overall business performance, especially in online retail and eCommerce.

This trend has seen an increase in software and service vendors in the web performance market together with the emergence of a new digital skill set; Web Performance Engineering.  

Web performance engineering is both a complex and diverse subject and in this article we look to identify some of t.....

A Decade of Web Performance

2020 is not only a new year but also the start of a new decade so in this article we take a look at how some industry-accepted web performance best practices have been impacted by the technology advances of the past ten years.

In the beginning

For many, the origins of web performance began with Steve Souders when he wrote his books High Performance Web Sites and Even Faster Web sites over 10 years ago.

In his work he developed 14 rules, listed below, that when applied should speed up the loading of web pages and the performance of websites.....

Using Web Performance to Maximize SEO

In the continual search for SEO benefits such as improved conversion rates, page views and search engine rankings, web performance optimization provides some invaluable extra ammunition.

The origins of web performance in SEO

Back in April 2010 Google announced the inclusion of Site Speed as a new signal in their search ranking algorithms.  This new signal was introduced to reflect how quickly a website could respond to web requests.  At the time Google stated that it had a low relevance as a ranking factor but since then site speed and web performance have begun to play a much more important role as a differentiation not only in improving user experience but also as a important factor for successful search engine opt.....

Optimizing Optimizely Part 2 Optimizing for Performance

In Part 2 we continue our investigation on how to improve web performance of the client-side Optimizely Web digital experience platform. Building on the discussion in Part 1 on its impact on the critical render path in this article we look at other key influences on web performance.

Background

In Optimizing Optimizely Part 1 we uncovered how the implementation of the snippet impacts on customer experience and discussed some best practices covering how to implement the Optimizely snippet.  In this article we take a look at how to optimize further to gain improved web performance for client-side in-browser implementations. 

Sizing the Optimizely snippet 

Part 1 covered how long the snippet can take to.....