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0 pointssteveklabnik1y ago0 comments

Both Go and Rust removed segmented stacks, for the same reasons: they can really kill performance.

Go now copies stacks, and Rust only has segments if you deliberately box up a recursive call.

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Go stacks are still growable, no?

And hence the "kinda" in async Rust. While boxed futures can be thought of as a segmented stack the literal callstack is not, which can still give you a stack overflow with a bunch of nested poll() calls.

steveklabnikOP1y ago

> Go stacks are still growable, no?

Depends on what you specifically mean by "growable": when a goroutine runs out of stack space, a new one that's larger (iirc double sized) is created, the old one is copied into it, and then execution can resume.

I can see the argument both ways.

> which can still give you a stack overflow

For sure.

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