Some Performance Blog Posts I've Bookmarked and Read Lately

This post summarizes some noteworthy performance-focused blog articles I've recently explored. Key takeaways include:

• Browser Back/Forward Cache Optimization: Understanding how the browser's back/forward cache (bfcache) works is crucial for developers. Actions like using the unload event can prevent pages from being cached, negatively impacting performance. Maximizing cache hit rates requires careful consideration of page eligibility.

• Comprehensive Site Performance Analysis with Lighthouse Parade: Unlike Lighthouse, which only analyzes individual pages, Lighthouse Parade assesses all site URLs and aggregates the results, providing a more holistic performance overview.

• Leveraging Modern Performance Features: The CSS content-visibility property offers significant performance gains by allowing selective rendering, but potential issues with scrollbar smoothness and accessibility need careful consideration.

• Image Optimization Beyond File Size: Image performance depends not only on file size but also on decoding and rendering time. The article highlights that GIF format consistently underperforms.

• Optimizing CSS-in-JS Performance: A dramatic performance boost (up to 175x) can be achieved by converting CSS-in-JS code to static CSS during the build process, a technique referred to as "Zero-Runtime."

• The Importance of Qualitative Performance Assessment: Real-world production testing is vital for uncovering performance issues, as the complexity of performance optimization often makes purely qualitative assessments insufficient.

• Utilizing Comprehensive Performance Checklists: For a thorough approach to performance optimization, Vitaly's 2021 Front-End Performance Checklist is a valuable resource.

• Identifying Performance Bottlenecks Through Large-Scale Analysis: A study analyzing millions of web pages revealed a strong correlation between HTTP/2 usage and improved performance.

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