UberSTCP

About

UberSTCP is a deliberate dive below the convenience layer: a custom TCP networking implementation where transport behavior and performance are visible engineering decisions.

Problem

Networking code is often judged through a narrow API while the hard parts stay out of sight. UberSTCP explores what changes when the implementation itself is the subject: how bytes move, where work is buffered, and how an API exposes the costs of the transport underneath.

Constraints

TCP is a byte stream, not a message bus. A useful implementation has to keep framing, ordering, partial reads and writes, failure handling, and resource use in view at the same time. Performance claims also need measurements that describe the workload rather than a slogan.

Build

The project is written in C# on .NET and uses TCP as its transport. The build keeps the path from application data to the peer close enough to inspect, which makes it useful both as working code and as a place to study trade-offs in a networking stack.

Outcome

UberSTCP is released as public open source. Its value here is not an unsupported superlative; it is a concrete implementation that makes a performance-oriented networking design available for review and reuse.

Lessons

Low-level work earns trust through evidence. A future pass should pair every optimization with a representative workload, a correctness check, and a baseline so that “faster” means something specific.