Performance
Lab data — simulated mobile 30
Before 30 After
Lab metrics
Metric
Before
With Turbulence
Speed Index SI
Before: 6.3 s
After: 6.3 s
First Contentful Paint FCP
Before: 5.0 s
After: 5.0 s
Largest Contentful Paint LCP
Before: 11 s
After: 11 s
Cumulative Layout Shift CLS
Before: 0.091
After: 0.091
Total Blocking Time TBT
Before: 2.2 s
After: 2.2 s
What changed (1)
- 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.