Understanding how to use Task and ValueTask

In this episode, Stephen Toub chats with Rich about ValueTask<T> and how it might help reduce allocations and memory usage for your asynchronous .NET code.

• [00:34] - What is ValueTask and why do we need it?
• [05:22] - What is a good scenario for ValueTask?
• [10:00] - What is IValueTask<T>?
• [12:14] - Why was the non-generic ValueTask introduced?
• [13:54] - Does ValueTask offer cancellation?
• [14:42] - What can you do with Task vs ValueTask?
• [16:28] - What's the uptake with ValueTask usage?
• [18:28] - How does IAsyncEnumerable task advantage of ValueTask?
• [21:11] - What other performance work is happening around allocations?

Useful Links

• Understanding the Whys, what's, and when's of ValueTask
• ValueTask reference docs
• NuGet package for ValueTask