Thoughts on Rust, a few thousand lines in

Re:Thoughts on Rust, a few thousand lines in by pcwalton on Thursday January 10, 2019 @12:23PM (#18875740)

Context switches on I/O are the same for 1:1 and M:N because you're eating the cost of a kernel to user context switch either way.

Memory usage per thread is a property of the GC, not M:N threading. You can have very small stacks in a 1:1 implementation too.

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Re:Thoughts on Rust, a few thousand lines in by skyde on Monday January 14, 2019 @02:27PM (#18905646)

there is less context switches because you cant write some data to several distinct file descriptor using a single system call.

You can also read data from several file descriptor in a single System Call.

This way you significantly reduce the number of System call instead of doing one blocking read() per connection. I believe context switch round trip (from user space to kernel to user space) is much more expensive than simply switching between goroutine of the same process.

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