Emitter

Emitter is a basic implementation of Reactive Streams in the style of RxSwift or Combine.

It's intended as a learning resource. Its smaller footprint and simplicity might make it easier to follow than OpenCombine — and definitely make it easier to follow than RxSwift.

Limitations

Emitter's only focus is on simplicity of implementation. It has clear limitations:

• Like RxSwift but unlike Combine it has no support for back pressure management or typed errors.
• It assumes a single threaded env.
• It has a limited number of implemented operators.
• The operators' speeds are not quite competitive with Combine's.

Operator performance