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Andy Davies

Andy Davies

Andy is a Freelance Web Performance Consultant and has helped some of the UK’s leading retailers, newspapers and financial services companies make their sites faster.

He's co-author of 'Using WebPageTest' published by O'Reilly and author of 'The Pocket Guide to Web Performance'.

Andy is also one of the organisers of the London Web Performance Meetup.

Understanding Resource Priorities

Monday, 7th – 11:30

Have you ever looked at the Network Panel in DevTools, or a waterfall in WebPageTest and wondered what determines the order of the resources, and how you can influence it?

In this talk we'll explore how browsers prioritise resources, how some of them adjust for network conditions, what part servers play and how the decisions we make as developers influence their behaviour, and our visitors' experience.

We'll also dig into the tradeoffs and pitfalls that you may come across with tools and techniques such as JS bundlers and standards such as Resource Hints.