Analyzes and reports the performance overhead of third-party scripts and resources using Playwright and CDP.
The third-party-impact skill provides a comprehensive performance audit of external dependencies on any webpage. By leveraging Playwright and Chrome DevTools Protocol (CDP), it automatically categorizes scripts into functional groups such as analytics, advertising, and social widgets. It measures critical metrics including main-thread blocking time via Long Task attribution, byte weight per category, and connection overhead. This skill is essential for developers and performance engineers who need to diagnose slow page loads, audit tag manager bloat, and make data-driven decisions about deferring or removing third-party vendors to improve Core Web Vitals.
Key Features
01Automatic vendor categorization for ads, analytics, social, and fonts
02CDP-based network monitoring for precise request tracking
03Detailed byte weight and network request breakdown per vendor
041 GitHub stars
05Identification of render-blocking third-party resources
06Main-thread blocking time measurement via Long Task attribution
Use Cases
01Performing cost-benefit analysis for third-party dependencies
02Diagnosing Core Web Vitals issues caused by external script execution
03Auditing Tag Managers to identify redundant or high-latency trackers
