I feel with Rust I try and avoid re-allocations in most cases anyway, so I'm not sure that musl's allocator being slow would significantly affect performance (though I haven't benchmarked it). I feel like part of the appeal of Rust is that you can do imperatively-style mutation-heavy code comparatively risk-free, so despite me normally being the "Functional Programming Nerd", I generally write Rust in a style that's a bit closer to C.
I use musl for my Rust stuff because I have noticed that for the stuff I write it appears to have a lower memory footprint; since a lot of what I do is IO-bound anyway, I care more about using less memory than raw performance.
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I feel with Rust I try and avoid re-allocations in most cases anyway, so I'm not sure that musl's allocator being slow would significantly affect performance (though I haven't benchmarked it). I feel like part of the appeal of Rust is that you can do imperatively-style mutation-heavy code comparatively risk-free, so despite me normally being the "Functional Programming Nerd", I generally write Rust in a style that's a bit closer to C.
I use musl for my Rust stuff because I have noticed that for the stuff I write it appears to have a lower memory footprint; since a lot of what I do is IO-bound anyway, I care more about using less memory than raw performance.