Await benchmarks

program.cs

using System.Threading.Tasks;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Columns;
using BenchmarkDotNet.Configs;
using BenchmarkDotNet.Reports;
using BenchmarkDotNet.Running;

var benchmarkOptions = DefaultConfig.Instance.WithSummaryStyle(SummaryStyle.Default.WithRatioStyle(RatioStyle.Trend));
_ = BenchmarkRunner.Run<AwaitBenchmarks>(benchmarkOptions);

public class AwaitBenchmarks
{
    [Benchmark(Baseline = true)]
    public async Task WithoutAwaits() => await WithoutAwaitMethod1();

    [Benchmark]
    public async Task WithAwaits() => await WithAwaitMethod1();

    private static Task WithoutAwaitMethod1() => WithoutAwaitMethod2();
    private static Task WithoutAwaitMethod2() => WithoutAwaitMethod3();
    private static Task WithoutAwaitMethod3() => MyAsyncMethod();

    private static async Task WithAwaitMethod1() => await WithAwaitMethod2();
    private static async Task WithAwaitMethod2() => await WithAwaitMethod3();
    private static async Task WithAwaitMethod3() => await MyAsyncMethod();

    private static async Task MyAsyncMethod() => await Task.Yield();
}

results.txt

|        Method |       Mean |   Error |  StdDev |        Ratio | RatioSD |
|-------------- |-----------:|--------:|--------:|-------------:|--------:|
| WithoutAwaits |   834.4 ns | 4.62 ns | 4.32 ns |     baseline |         |
|    WithAwaits | 1,037.8 ns | 7.25 ns | 6.79 ns | 1.24x slower |   0.01x |