Programmer Humor

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Learning to program in rust (programming.dev)

submitted 2 weeks ago by KernelPanic@programming.dev to c/programmer_humor@programming.dev

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[–] PlexSheep@infosec.pub 1 points 2 weeks ago (4 children)

You mean mutex? Arc allows synchronous read only access by multiple threads, so it's not a performance bottleneck. Locking a mutex would be one.

[–] tatterdemalion@programming.dev 5 points 2 weeks ago (2 children)

Arc is not free, and the extra atomic operations + heap allocations can become a bottleneck.

[–] PlexSheep@infosec.pub 1 points 2 weeks ago (1 children)

Oh, I did not know that. Well, it makes sense that it has a heap allocation, as it becomes more or less global. Though not sure why the atomic operations are needed when the value inside is immutable.

[–] Miaou@jlai.lu 1 points 2 weeks ago

How can you otherwise keep track of an object's lifetime if copies are made concurrently?

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