Reducing Third-Party Script Impact Improved Our INP Score
We noticed that user interactions were feeling sluggish despite having decent Core Web Vitals scores. After some investigation, we found that several third-party scripts were competing for the main thread during page load.
By delaying non-essential scripts until user interaction and using fetchpriority="high" only for critical assets, we achieved noticeably better Interaction to Next Paint (INP) results without sacrificing functionality.
We documented some of our optimization insights here:
Has anyone else experimented with prioritizing critical resources while deferring third-party scripts? I'd love to hear what techniques have worked best for improving real-world responsiveness.
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