The spansample from aalmada

Exception While Running Native Benchmark

Hello,

I saw in your excellent blog post the use of the benchmarks here. When checking out the code, however, there seems to be a NativeEnumerable benchmark that is not discussed in the blog post. Not that I can see, at least.

This. of course, gets me curious to download the code and try it out to see how it fares with the others. Unfortunately, it results in an exception which I will provide here:

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Runtime.InteropServices.SEHException: External component has thrown an exception.
   at SpanSample.Native.StreamRead(NativeStreamHandle stream, Int32& buffer, UIntPtr size)
   at SpanSample.NativeEnumerable.Enumerator.MoveNext() in C:\Users\..\Downloads\SpanSample-master\SpanSample\NativeEnumerable.cs:line 54
   at SpanSample.EnumerationBenchmarks.NativeEnumerable() in C:\Users\..\Downloads\SpanSample-master\SpanSample\EnumerationBenchmarks.cs:line 156
   at BenchmarkDotNet.Autogenerated.Runnable_0.WorkloadActionNoUnroll(Int64 invokeCount) in C:\Users\..\Downloads\SpanSample-master\SpanSample\bin\Release\netcoreapp2.1\bded5edd-b23b-45eb-8855-ac509f2a26ce\bded5edd-b23b-45eb-8855-ac509f2a26ce.notcs:line 466
   at BenchmarkDotNet.Engines.Engine.RunIteration(IterationData data)
   at BenchmarkDotNet.Engines.EngineFactory.Jit(Engine engine, Int32 jitIndex, Int32 invokeCount, Int32 unrollFactor)
   at BenchmarkDotNet.Engines.EngineFactory.CreateReadyToRun(EngineParameters engineParameters)
   at BenchmarkDotNet.Autogenerated.Runnable_0.Run(IHost host) in C:\Users\..\Downloads\SpanSample-master\SpanSample\bin\Release\netcoreapp2.1\bded5edd-b23b-45eb-8855-ac509f2a26ce\bded5edd-b23b-45eb-8855-ac509f2a26ce.notcs:line 143
   --- End of inner exception stack trace ---
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at BenchmarkDotNet.Autogenerated.UniqueProgramName.AfterAssemblyLoadingAttached(String[] args) in C:\Users\..\Downloads\SpanSample-master\SpanSample\bin\Release\netcoreapp2.1\bded5edd-b23b-45eb-8855-ac509f2a26ce\bded5edd-b23b-45eb-8855-ac509f2a26ce.notcs:line 59

A couple other notes:

I had to update the Windows SDK to a newer version
Same with some Nuget packages (expected of course)
When switching to Release mode, the x64 path was not there and results in an exception when trying to copy Native. It turns out that Release mode is set to Win32 for the Native project. I am not sure if this is due to updating the SDK, however (I am not very familiar with C++ projects).

Otherwise, this is extremely valuable and informative. Thank you for putting this together!
-Michael

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