Prevent Image Layout Shifts With width, height, and aspect-ratio
Reserve image space before download, test responsive behavior, and verify layout stability without forcing the wrong rendered dimensions.
Read the method →Category field notes
Performance Lab
Request, decoding, lazy-loading, priority, layout-shift, and DevTools workflows with test conditions recorded.
Lazy-Load Below-the-Fold Images Without Delaying LCP
Apply native lazy loading selectively, verify request timing, and keep likely LCP images eager and discoverable.
Read the method →Use fetchpriority and Preload for an LCP Image—Then Measure
Separate discovery from priority, test a likely LCP image, and avoid piling hints onto every above-the-fold asset.
Read the method →Test decoding=”async” Without Guessing at Rendering Impact
Understand the decoding hint, design a controlled visual test, and document when async decoding helps or changes presentation.
Read the method →Audit Every Image Request With Chrome DevTools
A request-by-request image audit that records bytes, dimensions, initiators, priority, cache behavior, and page context.
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