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5101 :: Funny string question

• Stefan_Salewski (orginal) [2019-08-16T16:22:53+02:00] view original

  import strutils
  proc test =
    var s: string
    s = "test" & "Nim"
    s[0] = toUpperAscii(s[0])
    echo s
  Run

  I wonder if the buffer for this short string is really allocated on the heap. Because, I think it don't has to, it should be possible for the initial small buffer to live on the stack.

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• Araq (orginal) [2019-08-16T16:48:08+02:00] view original

  Yes, Nim doesn't do C++'s "short string optimization". Neither does Rust. You can use array and cstring to optimize things for your use cases.

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