2 ms·

C# does indeed produce a rather tight assembly https://sharplab.io/#v2:EYLgtghglgdgNAFxBAzmAPgAgLACgACATAMx4DeemVm+xNAjAGyYA2A9jAOaYDKArmAAU7LgH4A2gF1MCABaxOKA

• orthoxerox 4y ago
  The compiler takes care of this, but the idiomatic way to write the body of the loop in C# is sum += things[i] ?? 0;
  • alkonaut 4y ago
    You could even argue the most idiomatic C# is things.Sum(x => x ?? 0) and there the real test would be if the compiler/jit would match the speed of the for() loop exactly, i.e. not allocating any enumerators on the heap, not boxing any values and so on.
    • evntdrvn 4y ago
      unfortunately LINQ-to-objects doesn't have the greatest reputation for generating great code/perf, due to a number of factors (largely due to historical impl/interface decisions, from what I understand)