@slightlylate Perf question: Is there any reason for Service Worker over/together with "Cache-Control: immutable" for immutable asset files?
Let's say you needed some HTML, a bit of JS, some CSS, and a few fonts to start your app offline. HTTP cache might evict only some.
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The result is a broken app (particularly on a flaky network or offline). SW+Cache let you *know* all assets are there
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That's the key to a reliably fast experience.
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& Web Standards TL; Blink API OWNER
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