Batching message processing improves performance by reducing network round-trips when handling events from messaging systems or event store subscriptions. Using .NET's IAsyncEnumerable, you can implement size-and-deadline-based batching by bridging it with System.Threading.Channels and the Open.ChannelExtensions library. The approach lets you define a maximum batch size and a timeout deadline — whichever is reached first triggers processing — making it efficient even under irregular event traffic. A reusable extension method wraps the channel-based batching logic back into an IAsyncEnumerable, keeping consumer code clean and idiomatic.
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