[eyelidlessness]

A browser can't retroactively reduce download time after a large file has been downloaded.

[avaer]

Notably, modern JS engines _do_ pull the same tricks that GCC does, which is why they're fast.

But that's indeed a solution to a different problem, on a different computer.

[idbehold]

Not with that attitude.

[toomuchtodo]

Have the CDN do it before delivery.

[nathancahill]

I could definitely see Cloudflare adding this as one of their addons. They already do some JS processing.