Performance
Lab data — simulated mobile 65
Before 100 After
Lab metrics
Metric
Before
With Turbulence
Speed Index SI
Before: 4.9 s
After: 914 ms -81%
First Contentful Paint FCP
Before: 1.4 s
After: 914 ms -36%
Largest Contentful Paint LCP
Before: 16 s
After: 929 ms -94%
Cumulative Layout Shift CLS
Before: 0.033
After: 0.000 -100%
Total Blocking Time TBT
Before: 296 ms
After: 5 ms -98%
What changed (4)
- picperf-banner Improves page load speed and visitor experience.
- Images re-encoded to AVIF/WebP Smaller image files that look the same
- Images re-encoded to AVIF/WebP Smaller image files that look the same
- Off-screen images lazy-loaded Images load as they scroll into view
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.