22 short tests of Combine – Part 1: Protocols

I wrote some experiments around Combine, Apple’s reactive programming framework, to gain insight into how Combine handles edge cases that have caused problems for me in other reactive programming frameworks. How do subscriptions work? How do I cache computations? When are publishers and subscribers released? Under what circumstances is Combine thread-safe? Is re-entrancy possible? Does Combine guarantee delivery-order? How does Combine’s performance compare to pre-existing reactive frameworks?

Source: 22 short tests of Combine – Part 1: Protocols