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A comment on Why is Rust slightly slower than C?. Parent comment

Re:Why is Rust slightly slower than C? by PrototypeNM1 on Thursday September 12, 2019 @04:12AM (#20949160)
Iirc RefCell is marked !Sync, I thought Mutex was the multithreadong analog?
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Re:Why is Rust slightly slower than C? by steveklabnik on Thursday September 12, 2019 @08:50AM (#20950820)
That's correct.
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