@jhusain not only that but we did introduce a CLI which allows you to bring in only what you need: https://github.com/Reactive-Extensions/RxJS/releases/tag/v2.3

@jhusain not only that but we did introduce a CLI which allows you to bring in only what you need: https://github.com/Reactive-Extensions/RxJS/releases/tag/v2.3.12 https://github.com/Reactive-Extensions/RxJS/releases/tag/v2.... Still in its early days but is very promising for making RxJS as small as you wish.