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A Complete Front-End Performance Checklist for 2021 by SmashingMagazine (bring lots of beer, its long and in-depth)

Web performance is a tricky beast, isn’t it? How do we actually know where we stand in terms of performance, and what exactly our performance bottlenecks are?

Is it expensive JavaScript, slow web font delivery, heavy images, or sluggish rendering? Have we optimized enough with tree-shaking, scope hoisting, code-splitting, and all the fancy loading patterns with intersection observer, progressive hydration, clients hints, HTTP/3, service workers and — oh my — edge workers?

And, most importantly, where do we even start improving performance and how do we establish a performance culture long-term?

Back in the day, performance was often a mere afterthought. Often deferred till the very end of the project, it would boil down to minification, concatenation, asset optimization and potentially a few fine adjustments on the server’s config file. Looking back now, things seem to have changed quite significantly…

Read the complete article at https://www.smashingmagazine.com/2021/01/front-end-performance-2021-free-pdf-checklist/

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