Low-entropy images
Low-entropy images are images that contain large areas of uniform color, simple gradients, or repeating patterns, such as logos or simple graphics. Because they have less detail and randomness ("entropy"), they are highly compressible and can be saved as very small files. This is in contrast to high-entropy images, like detailed photographs, which have more complex data and are harder to compress.
Related web performance terms
- Lab Data (Synthetic Monitoring)
Lab data is performance data collected in a controlled, repeatable environment using tools like Google Lighthouse or WebPageTest.
- Largest Contentful Paint (LCP)
A Core Web Vital that measures the perceived loading speed of a page. It marks the point in time when the largest content element (usually a hero image or a large block of text) becomes visible within the viewport.
- Largest Contentful Paint Subparts
The LCP Subparts are the distinct phases that make up the total Largest Contentful Paint time. Analyzing this breakdown is crucial for diagnosing the root cause of a slow LCP.
- Layout Thrashing
Layout Thrashing is a harmful performance anti-pattern.