Check of ciunkos.com/email-list-validator
Oct 21, 2026, 20:34 · manual
Score: Lighthouse-style estimate, without Speed Index. TBT is the lab stand-in for INP, which needs real interactions.
- Score
- 100good
- LCP
- 527 msgood
- CLS
- 0good
- TBT
- 0 msgood
- FCP
- 527 msgood
- TTFB
- 101 msgood
- LCP element
p.leadList Desk is a free email list validator by Przemysław Zalewski, an independent engineer. It flags dead domains, typos, disposable and role addresses before the- Page weight
- 34 KB
- Long tasks
- 1
- Conditions
- 412×823, DPR 1.75, CPU slowed 2×, 150 ms latency, 1.6 Mbps down, 750 kbps up, no cache, 3 loads, median
Loads
| Load | LCP | FCP | TBT | CLS | TTFB |
|---|---|---|---|---|---|
| 1 | 527 ms | 527 ms | 0 ms | 0 | 118 ms |
| 2 | 555 ms | 555 ms | 0 ms | 0 | 97 ms |
| 3 | 513 ms | 513 ms | 0 ms | 0 | 101 ms |