Check of ciunkos.com/ai-prompt-testing
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
- 555 msgood
- CLS
- 0good
- TBT
- 0 msgood
- FCP
- 555 msgood
- TTFB
- 62 msgood
- LCP element
p.leadYou fix one answer in the system prompt and three others quietly get worse. Eval Desk reruns all your test questions after every change and shows which broke, w- Page weight
- 23 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 | 625 ms | 625 ms | 0 ms | 0 | 62 ms |
| 2 | 524 ms | 524 ms | 0 ms | 0 | 48 ms |
| 3 | 555 ms | 555 ms | 0 ms | 0 | 62 ms |