任务在另一个线程上异步运行 .NET

Question

I have a procedure that needs to be executed on another thread, asynchronously. The procedure will process a number of data in batches (can receive 2 items or 40000). From local tests, the longest runtime was about 2 minutes (for 40000 items).

The scenario is the following: UI call to back-end, back-end starts an asynchronous thread that will run the procedure and then returns a boolean, to know if the request was received or not (these are the requirements, I do not use await/wait). I am not quite sure what to use here, between:

Task.Run(()=> MyProcedure())

OR

Task.Factory.StartNew(()=> MyProcedure(), TaskCreationOptions.LongRunning)

What would be the best option for this situation?

Answer 1

The procedure will process a number of data in batches

This can mean multiple things. If you are going to use async / await in those batches, such that your MyProcedure is actually asynchronous , then you should be fine with Task.Run ; the fact that MyProcedure releases itself back to the thread-pool whenever it has gone async means that this should work fine, for example:

async Task MyProcedure()
{
    while (ThereIsWorkToDo)
    {
       var batch = // ... gather some work
       await ProcessBatchAsync(batch).ConfigureAwait(false);
    }
}

However: if MyProcedure() is not asynchronous, but you just want to run it in the background, then yes, TaskCreationOptions.LongRunning might be reasonable, but for something that takes 2 minutes: so might be a regular dedicated thread.