Doing webperf without being disappointed

par Mathilde Duboille and François Hendriks, édition 2021

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Feedback on a performance optimization project for a French luxury e-commerce giant.

Objective: Increasing the Lighthouse score on 3G from 2/100 to 70/100. Ambitious 🧐? Oh yeah… But with a crack team of 3 full time developers on the project 🧑🏽‍💻👩🏼‍💻!

This talk will talk about the big performance work that has been done on an SSR site in NextJS, including:

Despite all these efforts and the enthusiasm of the team, the project was marked by many moments of disappointment.

Spoiler alert: We didn’t manage to reach the 70/100 mark or even the 20/100 mark in 3G.

Spoiler Alert 2: In 4G, the lighthouse score went from 40 to over 95 /100 🎉. Customers noticed the huge improvement in site performance and were therefore very satisfied.

If you too are worried about being disappointed with your performance improvements, this talk will give you valuable tips on how to make the most of your efforts.

Mathilde Duboille

Presented in French by Mathilde Duboille Web Developer, Theodo

Web developer for more than 2 years and active member of the performance and front-end dev community within Theodo.

François Hendriks

Presented in French by François Hendriks Tech Lead, Theodo

Francois has been working for more than two years at Theodo as a Tech Lead. Convinced that our development tools should be written in fast languages such as Go or Rust, he regularly does audits or performance missions involving both the front and back ends.