Performance
Lab data — simulated mobile 47
Before 63 After
Lab metrics
Metric
Before
With Turbulence
Speed Index SI
Before: 18 s
After: 8.9 s -50%
First Contentful Paint FCP
Before: 18 s
After: 1.4 s -92%
Largest Contentful Paint LCP
Before: 27 s
After: 20 s -27%
Cumulative Layout Shift CLS
Before: 0.000
After: 0.002
Total Blocking Time TBT
Before: 352 ms
After: 209 ms -41%
What changed (3)
- Speculation rules prefetching Browser prefetches likely navigation targets for instant loads
- Resource hints injected Browser knows what to fetch early
- Font display swap + DNS preconnect Text shows up while fonts load
How we measured this
- 1. We fetched your page and scored it with PageSpeed Insights (mobile, lab data).
- 2. We re-fetched it through a Turbulence preview environment that applies our transformation pipeline.
- 3. We scored the result with PageSpeed Insights again.
- 4. The deltas above are the difference — a directional estimate, not a forecast. First visits, geographic location, network conditions, and JS-rendered content all affect real-world results.