Browser & Web Performance · Senior · Question 74 of 75
Why do 'anti-flicker' snippets of client-side A/B testing tools often hurt LCP?
- ✓Correct answer: They hide the whole page until the experiment script loads and applies changes, or until a timeout
- 2They disable the preload scanner
- 3They block CSS from being cached
Explanation
A slow testing script delays all content. Server-side or edge-side experiments avoid hiding the page.