CoreWebVitalsPulse benchmark report
Across 21 well-known public sites scanned by Zalwin (as of 2026-10-27), the median CoreWebVitalsPulse score is 60/100. The least-passed check is "HTML arrives in under 0.8 s" (0% pass). Automated read-only checks; results may be incomplete.
Scanned 2026-10-27 · Automated read-only checks of public pages; may be incomplete. Not a certification.
Which checks do sites pass least often?
| Check | Priority | Sites passing |
|---|---|---|
| HTML arrives in under 0.8 s | medium | 0% (0 of 21) |
| HTML under 300 KB | medium | 19% (4 of 21) |
| Images declare width and height (prevents layout shift) | high | 38% (8 of 21) |
| At most 20 external scripts | low | 48% (10 of 21) |
| No more than 1 render-blocking script in <head> | high | 67% (14 of 21) |
| Below-the-fold images lazy-load | medium | 71% (15 of 21) |
| Web fonts use font-display: swap | medium | 90% (19 of 21) |
| At most 8 third-party script domains | medium | 100% (21 of 21) |
| Preconnect or preload hints for critical third parties | low | 100% (21 of 21) |
| Mobile viewport meta tag | medium | 100% (21 of 21) |
Signals found by site
- linear.app: 8 of 10 signals found (80/100)
- snowflake.com: 8 of 10 signals found (80/100)
- atlassian.com: 7 of 10 signals found (75/100)
- hubspot.com: 7 of 10 signals found (75/100)
- notion.so: 7 of 10 signals found (75/100)
- stripe.com: 7 of 10 signals found (75/100)
- vercel.com: 7 of 10 signals found (75/100)
- figma.com: 6 of 10 signals found (65/100)
- shopify.com: 7 of 10 signals found (65/100)
- twilio.com: 7 of 10 signals found (65/100)
- airtable.com: 6 of 10 signals found (60/100)
- datadoghq.com: 7 of 10 signals found (60/100)
- intercom.com: 6 of 10 signals found (60/100)
- slack.com: 7 of 10 signals found (60/100)
- cloudflare.com: 6 of 10 signals found (55/100)
- gitlab.com: 6 of 10 signals found (50/100)
- mailchimp.com: 6 of 10 signals found (50/100)
- monday.com: 6 of 10 signals found (50/100)
- zendesk.com: 5 of 10 signals found (50/100)
- webflow.com: 4 of 10 signals found (35/100)
- asana.com: 3 of 10 signals found (25/100)
Frequently asked questions
Which sites are in the CoreWebVitalsPulse benchmark?
21 well-known public sites scanned read-only by Zalwin. Site owners can request a correction or removal at any time.
How often is it updated?
The showcase scans refresh monthly.
Is this a certification or a ranking of quality?
No. It is an automated read-only check of a few public signals and may be incomplete.
Computed by Zalwin. Informational only. CoreWebVitalsPulse alternatives · All reports · Request a correction or removal