daily.dev optimized post page performance by addressing issues with excessive DOM size and JavaScript execution on pages with heavy user interactions and comments. They utilized Chrome's content-visibility property and lazy rendering comments with the IntersectionObserver API to improve page responsiveness and reduce main thread work, resulting in enhanced user experience and SEO.

5m read timeFrom daily.dev
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Measuring performance ⏱️Identifying the problem 🔍Fixing excessive DOM sizeOptimizing comments renderingResult
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