Jeremy D. Miller 7/29/2026

Fast Web Services with Marten and Polecat

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This article discusses building efficient web services in .NET by leveraging Marten and Polecat's JSON streaming feature, which writes raw JSON from PostgreSQL or SQL Server directly to HTTP responses, bypassing EF Core overhead and object mapping. It covers typed result wrappers for Minimal API endpoints, including StreamOne, StreamMany, StreamAggregate, and others, with OpenAPI metadata support. The focus is on optimizing read-side performance in CQRS architectures, particularly for event-sourced systems where query models are pre-built for clients.

Fast Web Services with Marten and Polecat

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