GTmetrix Performance Blog
News, updates and guides on GTmetrix and general web performance
Category: Optimization Explained
Get a better understanding of common web performance concepts.
Field vs Lab (Synthetic) Data – How Do They Compare?
We explain the key differences between field and lab data and how you should interpret them.
What Causes Bad CLS and How to Fix it?
We explain all the different causes of a poor CLS score and how to fix them.
A Designer’s Guide: Integrating Image Optimization and Building a Culture of Web Performance
Discover more strategies to make image optimization an integrated process in your project.
A Designer’s Guide to Image Optimization
We discuss image optimization strategies from a web designer’s perspective.
Long Purple Bars on Waterfall Chart: Hosting or Developer?
Seeing long purple bars on your Waterfall Chart? Figure out who to contact; your hosting provider or developer.
