You Are Serving a 2400px Image to a 390px Phone

The srcset was correct and the browser still downloaded the largest file. The sizes attribute was lying, and almost every theme I audit gets it wrong.

You Are Serving a 2400px Image to a 390px Phone. Abstract bug hunt illustration in orange and dark grey on debugly.dev
Before After
Image bytes 4.1 MB 480 KB
LCP 4.6 s 2.1 s
Requests over 200 KB 14 0

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Published on debugly.dev by Rohit Bhadani | Founder of Krova Cloud