Best way to optimise an if statement in C#?

Question

I was writing an app, and for this piece of code(in the end of a method)

if (selectSdfDialog.ShowDialog() == DialogResult.OK)
{
    Sdf = selectSdfDialog.FileName;
    var regex = new Regex("[VQ]\\d{11}");
    Serial = regex.Match(selectSdfDialog.SafeFileName).ToString();
}

Resharper gave me a hint to invert the if statement, bringing it to this

if (selectSdfDialog.ShowDialog() != DialogResult.OK) return;
Sdf = selectSdfDialog.FileName;
var regex = new Regex("[VQ]\\d{11}");
Serial = regex.Match(selectSdfDialog.SafeFileName).ToString();

My question is, is this working faster or somehow better, and if yes, what is the difference for the compiler?

it the same and resharper again can give you hint - invert this statement — Grundy, Jul 08 '15 at 15:21
It reduces the indentation. Can sometimes make the code more readable IMO. — M4N, Jul 08 '15 at 15:21
@Grundy in that case it's a just a possible command for resharper, but before this it was showing this hint with a yellow(maybe warning) sign — Carmine, Jul 08 '15 at 15:26

score 1 · Accepted Answer · answered Jul 08 '15 at 15:21

1

It's not a compiler optimization, it's an author optimization. It flattens arrow code.

answered Jul 08 '15 at 15:21

zzzzBov

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I like the last sentence: _"But whatever you do, you have to abandon the ill-conceived idea that there should only be one exit point at the bottom of the function."_ – Tim Schmelter Jul 08 '15 at 15:28

Best way to optimise an if statement in C#?

1 Answers1