IAsyncEnumerable buffer the results and not yield it as stream.

[aristotelis79]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

In this demo value controller the browser buffer and return all the result at 5sec and not every 500ms.

[Route("api/[controller]")] [ApiController] public class ValuesController : ControllerBase { [HttpGet] public IAsyncEnumerable<int> Get() { return FetchItems(); } static async IAsyncEnumerable<int> FetchItems() { for (int i = 1; i <= 10; i++) { await Task.Delay(500); yield return i; } } }

Expected Behavior

Expected to get one integer every 500ms and not all at the end of 5sec as doing on .net 6

Steps To Reproduce

New WebApi project and add the above Get endpoint to test it

Exceptions (if any)

No response

.NET Version

.net 7.0

Anything else?

ASP.NET Core version: .net 7.0

[brunolins16]

@aristotelis79 I believe it is related to dotnet/sdk#29152. Can you please confirm if the issue does not reproduce when dotnet run?

[ghost]

Hi @aristotelis79. We have added the "Needs: Author Feedback" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[aristotelis79]

Hi @brunolins16,
You are right. The bug has to be with the visual studio. I try it with dotnet run and I can't reproduce it.