I’ve never understood the “async I/O is too complicated, why can’t we just use goroutines?” criticism of Rust. You can! They’re called threads, and they work great.
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It's not really about performance so much as you just can't spawn thousands of OS threads.
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Sure you can! Try it!
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Unless I am mistaken, surely could be, goroutines are more like fibers in Intel parlance and especially from the high performance AAA game studios evidence arose about betting on fibers over threads for maximum speed (https://www.gdcvault.com/play/1022186/Parallelizing-the-Naughty-Dog-Engine …).I think Rust should offer the option
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