BenchmarkDotNet -序列不包含匹配元素

Question

我想创建一个基准测试方法，但是我得到了错误System.InvalidOperationException: „Sequence contains no matching element”。

例如，我将代码限制为一个非常简单的示例：

public class Program
{
 public static void Main()
 {
  BenchmarkRunner.Run<Benchmark>();
 }
}

[MemoryDiagnoser]
public class Benchmark
{
 private List<int> t = new List<int>(){5};

 [Benchmark]
 public List<int> AddElementsToList()
 {
  t.Add(1);
  return t;
 }
}

如果我在版本mod中运行程序，则会运行基准测试，但我得到了异常System.InvalidOperationException: „Sequence contains no matching element”和控制台。

OutOfMemoryException!
BenchmarkDotNet continues to run additional iterations until desired accuracy level 
is achieved. It's possible only if the benchmark method doesn't have any side-effects. 
If your benchmark allocates memory and keeps it alive, you are creating a memory leak.

You should redesign your benchmark and remove the side-effects. 
You can use 'OperationsPerInvoke', 'IterationSetup' and 'IterationCleanup' to do that.

Answer 1

好吧，我找到了解决办法。我的计算机没有足够的RAM来运行给定数量的基准测试迭代。只需将基准设置更改为：

[SimpleJob(RunStrategy.ColdStart, launchCount: 1, warmupCount: 5, targetCount: 5, id: "FastAndDirtyJob")]
[MemoryDiagnoser]
public class Benchmark
{
    private List<int> t = new List<int>() { 5 };

    [Benchmark]
    public List<int> AddElementsToList()
    {
        t.Add(1);
        return t;
    }
}