Matan · Performance · Loading

Speed Index (Performance)

Speed Index measures how quickly above-the-fold content visually fills in.

Pass condition in our engine: Lab Speed Index is under 3.4s when measured.

This Performance check is part of SEO-GEO scoring 2.2.1, last updated 2026-09-18. About 90 percent of the evaluation runs on the HTML we crawl, so you can verify the same pass condition with a free report.

1. Problem description

A good lab Speed Index is under 3.4s. It punishes pages that stay mostly blank while assets stream in.

2. Most common causes

  • Lazy-loading the hero.
  • Late CSS.
  • Large background videos.

3. How to fix it

  1. Prioritize above-the-fold images.
  2. Inline critical CSS.
  3. Avoid full-bleed autoplay media in the first viewport.

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