How does Visually affect Google Lighthouse scores?

Visually may introduce a slight impact on Lighthouse performance scores in some environments. Based on both internal monitoring and Shopify ecosystem observations, the impact is typically:

• Average impact: ~1-2%
• Worst-case scenarios: up to ~10%

However, Lighthouse scores do not always represent real-world user performance accurately, especially for highly dynamic ecommerce environments. In practice, Visually is engineered to maintain performance levels competitive with — and often better than — leading experimentation platforms such as Dynamic Yield and Google Optimize.

We continuously optimize our SDK and delivery mechanisms to minimize performance overhead while maximizing experimentation flexibility.