Let me start with this — this is by all means not a comparison of what should be your next choice for Front-End. It’s a small, relatively unsophisticated, comparison of three things: Performance, Size, and Lines of Code of pretty similar application.
Cornice provides helpers to build & document REST-ish Web Services with Pyramid, with decent default behaviors. It takes care of following the HTTP specification in an automated way where possible.
Learn about side effects and how to avoid them, how to wield immutablity to update objects and arrays in Redux reducers, and the easy way to update state with Immer.
Redux and React Redux explained as simply and as clearly as possible both through theory and examples. Learn about actions, reducers, store, connect, mapStateToProps, mapDispatchToProps and more!