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The three F's of Frontend Engineering
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Marco Otte-Witte @marcoow
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simplabs.com @simplabs
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Framework Fatigue WTF Fear of IE
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Framework Fatigue WTF Fear of IE
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WTF Fear of IE Framework Fatigue ¯\_(ツ)_/¯
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Framework Fatigue WTF Fear of IE
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Write Fast Run Fast Deliver Fast
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Write Fast Run Fast Deliver Fast
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Write Fast Run Fast Deliver Fast
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Write Fast Run Fast Deliver Fast
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Write Fast Run Fast Deliver Fast
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Delivering fast apps even faster
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GET / GET /app.js
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Link: ; rel=preload; as=script Resource Hints
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GET / GET /app.js
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GET / GET /app.js
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Link: ; rel=preload; as=script Link: ; rel=preload; as=script
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Preloading does not work with SRI Do not preload everything as bandwidth is limited!
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HTTP/2 Push could use that as well but there are problems https://jakearchibald.com/2017/h2-push-tougher-than-i-thought/
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preload is great when you know the URL but what if you don't?
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https://external-data-api.com/projects/12
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DNS lookup HTTP connect SSL Handshake TTFB Content Download
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DNS lookup HTTP connect SSL Handshake TTFB Content Download
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TTFB Content Download
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preload and preconnect make the browser aware of critical resources earlier in the loading process
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No request is faster than no request
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How likely are users to have fresh assets in their browser caches?
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- dist/assets/mweb.js: (>) grows from 412.267 KiB to 412.314 KiB - dist/assets/vendor.js: (>) grows from 1.126 MiB to 1.126 MiB
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- dist/assets/mweb.js: (>) grows from 412.267 KiB to 412.314 KiB - dist/assets/vendor.js: (>) grows from 1.126 MiB to 1.126 MiB
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there's much more HTTP/2 CDNs inlining critical CSS webpagetest.org RUM images SSR Bundle splitting
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Thanks
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simplabs.com @simplabs