Concurrent Coroutines – Concurrency is not Parallelism

Concurrent Coroutines – Concurrency is not Parallelism

Kotlin, Software Development
On Kotlin Coroutines and how concurrency is different from parallelism The official docs describe Kotlin Coroutines as a tool "for asynchronous programming and more", especially are coroutines supposed to support us with "asynchronous or non-blocking programming". What exactly does this mean? How is "asynchrony" related to the terms "concurrency" and "parallelism", tags we hear about a lot in this context as well. In this article, we will see that coroutines are mostly concerned about concurrency and not primarily about parallelism. Coroutines provide sophisticated means which help us structure code to make it highly concurrently executable, also enabling parallelism, which isn't the default behavior though. If you don't understand the difference yet, don't worry about it, it will get clearer throughout the article. Many people, I included, struggle to make use…
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Kotlin Coroutines Guide – Concurrent Programming in Kotlin

Kotlin Coroutines Guide – Concurrent Programming in Kotlin

Functional Programming, Java, Kotlin
updated 10/29/2018 Introduction and Motivation In this article, you will learn about Kotlin Coroutines: What they are, what they look like, and how they work. The demonstrated code examples were tested with Kotlin 1.3.0 and kotlinx.coroutines 1.0.0. Kotlin coroutines are one of the "bigger features" as indicated by the following quote, taken from JetBrains' blog: We all know that blocking is bad under a high load, that polling is a no-go, and the world is becoming more and more push-based and asynchronous. Many languages (starting with C# in 2012) support asynchronous programming through dedicated language constructs such as async/await keywords. In Kotlin, we generalized this concept so that libraries can define their versions of such constructs, and async is not a keyword, but merely a function. This design allows the…
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