I think these things are used more for developer experience than for performance, since you can always just do the initialization in main if you really have to.

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Animats 2 hours ago | parent [-]

It's something of an issue if you have some crate that needs to set itself up at load time without a call from main. But those are very rare. Even "simplelog" needs a call at startup to do anything.

	▲	ameliaquining 2 hours ago \| parent [-]
		Yeah, I think of avoiding the call from main as a devex consideration rather than a performance one, since either way the initialization code runs once at process startup.