Performance
Lab data — simulated mobile 99
Before 100 After
Lab metrics
Metric
Before
With Turbulence
Speed Index SI
Before: 3.5 s
After: 768 ms -78%
First Contentful Paint FCP
Before: 752 ms
After: 768 ms
Largest Contentful Paint LCP
Before: 1.2 s
After: 1.5 s
Cumulative Layout Shift CLS
Before: 0.000
After: 0.000
Total Blocking Time TBT
Before: 0 ms
After: 0 ms
What changed (2)
- Render-blocking resources deferred Page paints before stylesheets finish
- Images re-encoded to AVIF/WebP Smaller image files that look the same
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.