Streaming three ways with Blazor: REST, gRPC, and SignalR
summary
Live demos build a Blazor Server app, a SignalR hub using SignalR channels push and IAsyncEnumerable endpoints, a Web API method that returns async streams, and a gRPC service with a proto-defined stream. Measurements show fetching 5,000 records: Web API ~2s, gRPC RPC ~0.3–0.5s, gRPC stream ~1s, but initial-item latency falls dramatically — first 20 items: Web API stream ~57ms, gRPC stream ~34ms after warmup. Conclusion: streaming uses IAsyncEnumerable pull vs channel push to improve perceived performance and scalability, not raw throughput; gRPC web is used for browser clients.
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chapters (10)
- 0:00Start
- 6:28Async Streaming
- 12:50Signalr Streaming
- 13:22Signalr Hubs
- 18:28Creating a Bounded Channel
- 20:19Get Channel Stream
- 23:23Web Api and Grpc
- 33:39Json Serializer
- 34:38Grpc
- 42:02Grpc Generator
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