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Asked: 2026-05-23T20:00:34+00:00

I want to check whether or not a variable string data contain empty string.

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I want to check whether or not a variable string data contain empty string.

Which is more efficient, data.Length==0 or data==string.Empty?

I forgot to say, the data has been checked and it is guaranteed to be not null.

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1 Answer

  1. Editorial Team

    Test results for 100 million iterations:

    Equality operator ==:   796 ms 
string.Equals:          811 ms 
string.IsNullOrEmpty:   312 ms 
Length:                 140 ms  [fastest]
Instance Equals:       1077 ms

    source

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