Understanding the Impact of Page Tags on Site Speed and User Experience

How Some Tools Negatively Affect Website Performance

Leading research shows that visitor behavior is directly related to the speed of the browsing experience. Testing is key for improving the customer experience and increasing conversion rates. But, some testing tools and methodologies can have an adverse effect. When it comes to website testing and optimization, not all page tags are created equal.

This research paper analyzes five JavaScript-based testing and targeting tools across ten websites and shows how JavaScript-based tools can negatively affect performance, from a 7% decrease in speed (best case) to a 31% decrease (worst case).