Why Python Is Slow: Looking Under the Hood

Re:Why Python Is Slow: Looking Under the Hood by Cyther606 on Tuesday November 18, 2014 @07:25PM (#8627376)

Check out Nim.

    import rdstdin, strutils
    
    let
      time24 = readLineFromStdin("Enter a 24-hour time: ").split(':').map(parseInt)
      hours24 = time24[0]
      minutes24 = time24[1]
      flights: array[8, tuple[since: int,
                              depart: string,
                              arrive: string]] = [(480, "8:00 a.m.", "10:16 a.m."),
                                                  (583, "9:43 a.m.", "11:52 a.m."),
                                                  (679, "11:19 a.m.", "1:31 p.m."),
                                                  (767, "12:47 p.m.", "3:00 p.m."),
                                                  (840, "2:00 p.m.", "4:08 p.m."),
                                                  (945, "3:45 p.m.", "5:55 p.m."),
                                                  (1140, "7:00 p.m.", "9:20 p.m."),
                                                  (1305, "9:45 p.m.", "11:58 p.m.")]
    
    proc minutesSinceMidnight(hours: int = hours24, minutes: int = minutes24): int =
      hours * 60 + minutes
    
    proc cmpFlights(m = minutesSinceMidnight()): seq[int] =
      result = newSeq[int](flights.len)
      for i in 0 .. <flights.len:
        result[i] = abs(m - flights[i].since)
    
    proc getClosest(): int =
      for k,v in cmpFlights():
        if v == cmpFlights().min: return k
    
    echo "Closest departure time is ", flights[getClosest()].depart,
      ", arriving at ", flights[getClosest()].arrive

https://github.com/Araq/Nimrod/wiki/Nimrod-for-C-programmers

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Re:Why Python Is Slow: Looking Under the Hood by rdtsc on Tuesday November 18, 2014 @09:05PM (#8627800)

If I had to guess speed is pretty close to C, right.

Nim is pretty awesome and has been around for a while. I wish one of big entities out there Google, Mozilla, Microsoft, Apple would have adopted Nim and ran with it instead of inventing their own langauges.

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Re:Why Python Is Slow: Looking Under the Hood by bjz_ on Wednesday November 19, 2014 @05:01AM (#8629122)

At the time when Go and Rust were conceived Nim would have certainly not been on their radar. Both were announced in 2009, at a time when the Nimrod repository had barely even got off the ground[0]. And Nim doesn't really address one of Apple's chief concerns: smoothly transitioning away from Objective-C.

[0]: https://github.com/Araq/Nimrod/graphs/contributors

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