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Compression Dictionary Transport allows you to DRASTICALLY reduce download sizes in Chrome. E.g. if you have app.v1.js and app.v2.js is released, a lot of the code is likely the same, so why download it all again? Want to know more? Check out this new guide: developer.mozilla.org/en-US/docs/W...

developer.mozilla.orgCompression Dictionary Transport - HTTP | MDNCompression Dictionary Transport is a way of using a shared compression dictionary to dramatically reduce the transport size of HTTP responses.

4/4/25, 11:22 am16 reposts27 likes

Barry Pollard

@tunetheweb.com

4 Apr 2025

Check out some of these examples: github.com/WICG/compres... Would you like your bundle sizes to be 90% smaller when you release a new version?

OK but is it used in prod? That's a big fat yes! With the likes of DoubleClick using it and more Google properties experimenting, it's already being used by 8% of the web! It's Chromium-only for now, but with +ve signals from Safari and Firefox and the huge potential that's surely gonna change!