Andy Davies is associate director for web performance at NCC Group, where he works with clients to measure and improve the performance of their websites. He also wrote “A Pocket Guide to Responsive Web Performance” for Five Simple Steps.
Increasingly we rely on third-party scripts to deliver business-critical features of our sites – analytics, adverts, multi-variant testing, comments, recommendations, retargeting, social sharing etc.
These scripts often get added with the seemingly innocent “it’s just a snippet of JavaScript”, but they can have a dramatic impact on performance – from slowing the loading speed though to ‘janky’ interactions.
In this talk Andy will explore how some popular types of 3rd parties affect performance, strategies for managing them and examples from sites that have tamed them.
You’ll come away with a better understanding of third-party performance, and pointers on how to reduce their impact on your visitors’ experience.