Thread

Go Concurrency Distilled

402 points · 187 comments · chmaynard

SamInTheShell · 1790469542 · focus · HN ↗
The concurrency and threading in Go just feels like magic compared to every other language. I'm a goroutine addict and I refuse to be rehabilitated.
Just from observations over the years, I don't think there's any other language quite like this, in terms of how things can end up happening in any thread.
1. osigurdson · 1790472477 · focus · HN ↗
  >> in terms of how things can end up happening in any thread
  Doesn't that describe pretty much any green thread style concurrency implementation.
  1. dlisboa · 1790477447 · focus · HN ↗
    No. Preemptive scheduling plus M:N mapping combination that Go has is not common in other major implementations.
    Other languages and their implementations of green threads usually have cooperative scheduling or M:1 mapping
    nh2 · 1790506580 · focus · HN ↗
    Haskell had preemptive M:N green-threading before Go was invented.
    I believe Go didn't originally have it, and added it in 2020, 14 years after Haskell.
    jeremyjh · 1790519268 · focus · HN ↗
    Before that, Go did preempt on function calls. Haskell preempts on memory allocation. There is no idiomatic Haskell code that loops without allocating, but it is possible. Go code that loops without function calls is probably a lot more common but still avoidable.

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