Case Study: Performance Testing For A Utilities Company

Tangent wanted to provide their client with certainty that its site architecture was scalable and performant.

Tangent – 12 Month Load & Performance Testing Partnership

Learn how Tangent used the insights from our load testing service to save hundreds of thousands of dollars.

The background

Tangent is a global agency who create powerful digital products and experiences for some of the world’s largest brands and organisations, including  Amazon, Regus, SAP and REED. As part of their client service level agreements (SLA), they guarantee to keep their client’s sites available, up and running 99.99% of the time, even during peak periods.

In early 2022, Tangent engaged Zoonou’s independent load testing services to optimise performance of their clients’ sites. Their client, one of the UK’s largest electricity distribution network operators, manages the power infrastructure for approximately 8 million households. It’s a priority for the client, in the event of extreme weather or a high-voltage fault, that its site remains operational for customers, so they can access vital information and services.

While they can’t predict the weather, Tangent wanted to provide their client with certainty that the site architecture was scalable and performant.

Our Solution

Automated test suites, designed to replicate real-world behaviour, were created by Zoonou’s Performance Test Analysts. The tests were executed using an in-house solution that extends the functionality of Apache JMeter and is powered by Amazon Web Services.

Over the course of 12 months, Zoonou executed more than 50 test runs across 4 periods of performance testing. Each round of testing focused on specific goals:

  1.       Optimising the performance of a business-critical web page in the event of a sudden burst of web traffic.
  2.       Analysing site performance following the implementation of new features.
  3.       Identifying latency and server errors on a small selection of API endpoints in real-time.
  4.       Evaluating how the site handles a growing number of users over an extended time period.

The load tests were monitored in real-time by Zoonou alongside the Tangent team. This allowed Tangent’s developers to implement changes to the site between tests and see the reshaping of results, run after run.

The Outcome

The data output from each round of performance testing enabled Tangent to make informed changes to the site’s architecture and content delivery network. The implementation of these changes in configuration ensured the most effective and cost-efficient support for varying user loads and scenarios. The results ensured Tangent met their SLA commitments as demonstrated in the graphs below.



In this graph, from the first load test, the site returned errors (orange line) throughout the test, indicating the site was unable to support increased traffic.



After 12 months of repeated testing, investigation and infrastructure updates a final test was executed. The graph demonstrates the site is now able to support a higher number of concurrent users, with no errors reported.

Key services from this case study:

Load Testing

Working with Zoonou has been a dream. They have felt like an extension of our team, they understand what we are trying to achieve and the business goals for our clients. The scripted journeys and load testing service they supplied is truly enterprise. Furthermore, the reports Zoonou provided gave us the insight to make architectural decisions, right-size infrastructure; saving hundreds of thousands of dollars. Together, we were able to identify bugs before they hit production and give our client reassurance that our systems are storm ready.

Andy Eva-Dale
Technical Director - Tangent

We've found the right test strategy for hundreds of clients.

Contact us today to find out how we can help you with your next project.

Get in touch