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A comment on Show HN: JXL.js – JPEG XL Decoder in JavaScript Using WebAssembly in Web Worker. Parent comment

Re:Show HN: JXL.js – JPEG XL Decoder in JavaScript Using Web... by Retr0id on Tuesday November 22, 2022 @09:03AM (#33705860)
That fast route would only be possible for a subset of JXLs, though.

With control over codec parameters (turning down/off zlib compression), PNG can definitely encode/decode faster (in software). There might be a gap in the market for such an implementation though, perhaps I should make it.

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Re:Show HN: JXL.js – JPEG XL Decoder in JavaScript Using Web... by vanderZwan on Tuesday November 22, 2022 @09:31AM (#33706168)
I'm guessing the author suspects the more common first adaptation of JXL will be losslessly re-encoded JPEGs. In other words: the very subset you mention, right?

Having said that, the author seems very open to suggestions and contributions - I suggested using canvas instead of a data URL-based PNG a week ago and within a day they had implemented a version of it.

edit: the other reason might be having smaller image sizes in the cache.

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