Speeding Up Async Snippets
CSS Wizardry
OCTOBER 12, 2022
At its simplest, it looks a little like this: var script = document. src = ' [link] ' ; document. The reason they give us this cumbersome snippet, and not a much more succinct , is purely historical: async snippets are a legacy performance hack. Well, unfortunately, this performance polyfill is bad for performance.
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