Performance
Lab data — simulated mobile 42
Before 72 After
Lab metrics
Metric
Before
With Turbulence
Speed Index SI
Before: 9.5 s
After: 3.0 s -69%
First Contentful Paint FCP
Before: 2.9 s
After: 2.0 s -32%
Largest Contentful Paint LCP
Before: 31 s
After: 16 s -49%
Cumulative Layout Shift CLS
Before: 0.064
After: 0.000 -100%
Total Blocking Time TBT
Before: 784 ms
After: 124 ms -84%
What changed (4)
- Resource hints injected Browser knows what to fetch early
- Render-blocking resources deferred Page paints before stylesheets finish
- CSS and JavaScript minified and edge-cached Stylesheets and scripts load faster with smaller, cached files
- 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.