February 2020
Intermediate to advanced
412 pages
9h 36m
English
Content preview from Learning RxJava - Second Edition
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Nuances of observeOn()
The observeOn() operator comes with nuances to be aware of, especially when it comes to performance implications due to a lack of backpressure, which we will cover in Chapter 8, Flowable and Backpressure.
Let's say you have a chain of Observable operators with two sets of operations, Operation A and Operation B. Let's not worry what operators each one is using. If you do not have any observeOn() between them, the operation will pass emissions strictly one at a time from the source to Operation A, then to Operation B, and finally to the Observer. Even with subscribeOn(), the source will not pass the next emission down the chain until the current one is passed all the way to the Observer.
This changes when you introduce ...
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