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Re:Dashmap: Fast concurrent HashMap for Rust by nickez on Friday March 27, 2020 @06:56AM (#22701835)
I think you missed parent's point. There are constructs that the current compiler can't prove is correct and to write such code you need unsafe. It is often not about a trade-off between speed/safety.
Re:Dashmap: Fast concurrent HashMap for Rust by Jonhoo on Friday March 27, 2020 @08:20AM (#22702258)
I actually gave a talk about exactly this a few weeks back that may be relevant: https://youtube.com/watch?v=QAz-maaH0KM
Re:Dashmap: Fast concurrent HashMap for Rust by asdf-asdf-asdf on Friday March 27, 2020 @08:25AM (#22702289)
oh, i see what you mean. yes, i did somehow miss the "You can't build everything in safe Rust - certain things _require_ the use of unsafe." part of the argument.

i did talk about it in my other comment here: https://news.ycombinator.com/item?id=22701550