Java Streams and Reactive Streams implementations of Sequential/Parallel Factorial Computation

This video walks through a Java program that implements various ways of computing factorials for BigIntegers to demonstrate the performance of alternative parallel and sequential algorithms, as well as the dangers of
sharing unsynchronized state between threads. It illustrates both Java sequential/parallel streams and sequential/parallel reactive streams implementations via RxJava and Project Reactor.

All the code is available in open-source form at