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Performance Engineering

Pagespeed - the need for speed in a digital world

For online companies, a slow loading website can be disastrous. Poor page performance can cause significant issues affecting the overall customer experience.

The longer your page takes to load, the higher the chance that a customer will leave the site. As well as reputational damage, that poor user experience can result in fewer conversions and a loss of revenue.

Our Pagespeed Leaderboard


We actively look at the world's largest companies' websites to test how pagespeed varies. We analyse a number of data points and metrics to calculate the score including:


  • Page load time
  • JavaScript execution time
  • Content size
  • Caching
  • Image scaling
  • Google's Core Web Vitals

Excellent (76-100)

There is a strong focus on performance within the organisation, users will benefit from good page load times and SEO will be high.

Fair (50-75)

Evidence of some best practice being applied but still many areas for improvement.

Requires Improvement (0-49)

Some basic performance techniques being missed and a significant impact on user experience.

How we measure pagespeed

We base our pagespeed index on 35 unique data points. These criteria are used to weigh, score and rank website performance across the world.

Factors that affect performance constantly shift. This process is heuristic; changing based on the live data we obtain from companies we’re tracking. As such, we’re committed to updating and iterating our 35 criteria as we progress.

Pagespeed Index Leaderboard

Choose a sector to see the data

View and compare website pagespeed across different sectors and companies.

How to improve performance

There are some simple steps you can take to improve pagespeed performance and deliver some quick wins.

Read the e-Book

Every second counts
Speed is an increasing unit of strength in eCommerce. A strong focus on website performance within the organisation will result in good page load times, increased customer satisfaction and superior SEO.

Read now