Load the largest visible element faster

Help me load the largest visible element of a page faster.
Page: [Page]
Element: [Element]
Setup: [Setup]
Steps: 1. Read the measurement report and the start of the page's HTML and name the largest element in the first visible area on mobile and desktop. 2. Split this element's load time into parts: server response, wait until loading starts, load duration and time until it is shown. 3. Check common brakes: image is lazy-loaded, image is inserted only by a script, file too large, blocking stylesheets or fonts, redirects. 4. Suggest changes such as announcing the image early, turning off lazy loading for this image, serving suitable sizes and formats or inlining critical styles. 5. Sort the changes by expected impact and effort. 6. Describe how to check the result after the change with lab data and real user data.
Output: element per device, time breakdown, list of changes sorted by impact and a check plan.

Take particular care to focus on the one element that shapes how fast the page feels.

Before you answer, check: Are all instructions met? If key information is missing or a placeholder in square brackets is still in the text, ask instead of guessing. Mark assumptions as assumptions.​