In programming, the async/await pattern may be a syntactic feature of the many programming languages that permits an asynchronous, non-blocking function to be structured in a way almost like a standard synchronous function. it's semantically associated with the concept of a coroutine and is usually implemented using similar techniques, and is primarily intended to supply opportunities for the program to execute other code while expecting a long-running, asynchronous task to finish, usually represented by promises or similar data structures. The feature is found in C# 5.0, Python 3.5, Hack, Dart, Kotlin 1.1, Rust 1.39,[1] Nim 0.9.4[2], and JavaScript ES2017, with some experimental add extensions, beta versions, and particular implementations of Scala[3] and C++.

Asynchronous programming may be a sort of parallel programming that permits a unit of labor to run separately from the first application thread. When the work is complete, it notifies the most thread (as well as whether the work was completed or failed). There are numerous benefits to using it, like improved application performance and enhanced responsiveness.

The main benefits of asynchronous programming using async / await include the following:

Increase the performance and responsiveness of your application, particularly once you have long-running operations that don't require to dam the execution. during this case, you'll perform other work while expecting the result from the long-running task.

Organize your code in a neat and readable way significantly better than the boilerplate code of the traditional thread creation and handling. with async / await, you write less code and your code is going to be more maintainable than using the previous asynchronous programming methods like using plain tasks.

async / await is that the newer replacement to BackgroundWorker, which has been used on windows forms desktop applications.

You make use of the most recent upgrades of the language features, as async / await was introduced in C# 5, and there are some improvements added to the feature like for every async and generalized async type like ValueTask.

The non-blocking programming when you have long-running operations that don't require to dam the execution. during this case, you'll perform other work while expecting the results of the long-running task.

Imagine that we've two program flow and that they can add parallel without blocking one another.

Example: for instance that we'd like to log every error appear but at an equivalent time this could not block the flow so therein case we will log and return a message at an equivalent time.

the advantage of thread management in async/await programming we know that in normal programming (blocking), every line of code is obstructing everything after it until it finishes the method albeit we've different flows (two flows with none dependency). but in async/await programming, the appliance won't block this thread, in other words, they're going to release it to try another work and when the function finishes the work any free thread will handle the response.

“Basically you'll use Asynchronous programming except when the next conditions are true…”

You are aiming for simplicity instead of efficiency. You are looking to run simple or short-running operations. Asynchronous programming won't provide benefit and truly will end in additional overhead on operations that are primarily CPU operations instead of people that involve network or overhead.

In Conclusion Async/await is one of the foremost revolutionary features that are added to JavaScript within the past few years. It causes you to realize what a syntactical mess promises are and provides an intuitive replacement.

Concerns Some valid skepticism you would possibly have about using this feature is that it makes asynchronous code less obvious: Our eyes learned to identify asynchronous code whenever we see a callback or a .then, it'll take a couple of weeks for your eyes to regulate to the new signs, but C# had this feature for years and other people who are conversant in it know it’s worth this minor, temporary inconvenience.