The final part of Kotlin Coroutines – Async & Await.

Kotlin Coroutines – Async & Await (Last Part)

Launching a coroutine allows for sequential execution, with each line being executed in order. However, when performing two file operations, each taking four seconds, one would have to wait for the other, resulting in a total of 8 seconds. By using async and await, the operations can be executed independently, reducing the total time to 4 seconds. This approach ensures efficient and concurrent file retrieval, making the process more effective and timely. Cheers to mastering Kotlin coroutines! 🚀👏

Introduction

Hello and welcome to the final video of the Kotlin coroutines playlist. In this last section, we will be discussing the concepts of "Async" and "Await".

Understanding Execution Sequence

When we launch a coroutine, the code is executed in a sequential manner, line by line. For example, if we have two functions that each take 4 seconds to retrieve a file, and we launch these two functions within a coroutine, the second function will have to wait for the first one to finish, resulting in a total wait time of 8 seconds.

Launching Coroutines

To resolve the issue of waiting time, we can launch each file retrieval operation in a separate coroutine using the launch function. This allows for the operations to be executed independently, thus reducing the overall wait time to 4 seconds.

Implementing async and await

However, instead of using the launch function, Kotlin offers us a more efficient solution called async and await. By using async and await, the retrieval of each file can occur simultaneously without waiting for the other, effectively reducing the overall wait time to 4 seconds. This simplifies the execution process and improves overall efficiency.

Concluding the Kotlin Coroutines Playlist

With the completion of this video, we have now concluded the Kotlin coroutines playlist. In the next playlist, we will delve into the topic of Kotlin flows, which will build upon the foundational understanding of coroutines. Thank you for your support and see you in the next video!

Key Takeaways