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Games are 0.00001% of software? Web browsers? Operating systems?

Large parts of web browsers (like entire Firefox' UI) is written in javascript already

Operating systems _should_ use GC languages more. Sure, video needs to have absolute max performance... but there is no reason my keyboard or mouse driver should be in non-GC language.

Most programs should be written in GCd languages, but not this.

Except in a few cases, GCs introduce small stop-the-world pauses. Even at 15ms pauses, it'd still be very noticeable.

There are GC algorithms that don’t require stopping the world.

Might want to read up on Ponylang. GC'd FOSS language without the stop-the-world pauses, demonstrating that it's possible. Should also be pointed out, that there are a number of proprietary solutions that claim GC with no pauses. Unfortunately, if coming from more common C-family languages, Ponylang may require more to get used to the actor model and different syntax.

> Large parts of web browsers (like entire Firefox' UI) is written in javascript already

Is UI even a large part of Firefox? I imagine that the rendering engine, JS engine, networking, etc, are many times larger than UI.

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