Reports

Here is my benchmark.

public class LinqBenchmarks {enter image description here private int[] _numbers;

    [GlobalSetup]
    public void Setup()
    {
        _numbers = Enumerable.Range(1, 1000).ToArray();
    }


    [Benchmark]
    public int FirstOrDefaultCondition()
    {
        return _numbers.FirstOrDefault(n => n == 800);
    }

    [Benchmark]
    public int WhereFirstOrDefault()
    {
        return _numbers.Where(n => n == 800).FirstOrDefault();
    }

}

Benchmark So it looks like the Where(n => n ==800).FirstOrDefault() is faster than the FirstOrDefault(n => n == 800). Please see the image in benchmark.

79268571