Matan · SEO · Performance
Load time
How long the HTML document takes to download from our crawler — a floor under real user speed.
Pass condition in our engine: HTML download time is under 1 second (warning under 2s; fail at 2s+).
1. Problem description
Slow HTML delays everything else: CSS, LCP, and crawler throughput. We measure server-side fetch time, not a browser’s full load event. Under 1s is healthy; past 4s is critical for this check.
2. Most common causes
- Uncached origin rendering (heavy PHP/Node per request).
- No CDN; the server is far from the crawler.
- Huge HTML with inlined images or CSS.
3. How to fix it
- Cache HTML at the edge where the page is public.
- Cut TTFB (see the TTFB check) and enable compression.
- Remove multi-megabyte inline payloads from the document.
Test this check
We fetch only this URL (plus robots.txt / llms.txt at the domain root when the check needs them). We do not crawl the rest of the site like a full report.
Scoring rules for the full site crawl are documented in methodology. Want every category at once? Generate a free report.
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