Episode 21 of The Web Development Podcast digs into the hidden cost of third-party scripts. Lucas and Luna walk through a real case: a mid-size e-commerce site that unknowingly loaded 14 widgets — analytics, chat, A/B testing, ad retargeting — and saw its median LCP balloon to 8.2 seconds. They explain why each script is a synchronous bottleneck, how request chains amplify latency, and the one metric no one checks: total script execution time on the main thread. They also share a practical audit workflow using Chrome DevTools and a simple budget-based approach to decide what scripts stay. If you've ever added a snippet without measuring the cost, this episode will change how you think about every single embed.

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