Explore the inner workings of Reactor's execution model in this 49-minute conference talk by Simon Baslé at Devoxx. Delve beyond the Reactor Flux API and Reactive Stream concepts to understand the runtime behavior of Flux and Mono instances. Learn about assembly time vs. execution time, work stealing, subscription mechanics, operator fusion, and the Reactor execution model. Gain insights into hot vs. cold publishers, scheduler abstraction, publishing, threading, and microfusion. Discover why Reactor is used and have your questions answered about this powerful reactive programming library.