Mis vahe on asünkroonse programmeerimise ja mitme lõimega programmeerimise vahel?

Asynchronous programming allows executing operations without blocking the main thread, using mechanisms like await and task management (Task). Operations can be performed on the same thread or in a thread pool:

Multithreading involves creating or using multiple threads within a single process. This enables concurrent execution of multiple tasks, utilizing multi-core processors:

The main difference is that asynchronous programming focuses on non-blocking I/O and efficient resource use, while multithreading is about parallel execution of computations. Asynchronous approach can use multithreading "under the hood", but does not require explicit thread management by the developer:

Example of asynchronous code:

public async Task<string> GetDataAsync()
{
    // Asynchronous operation, e.g., network request
    var result = await httpClient.GetStringAsync("https://api.example.com/");
    return result;
}

Example of multithreaded code with explicit thread creation:

public void ProcessDataInThread()
{
    Thread workerThread = new Thread(() =>
    {
        // Perform long operation in a separate thread
        // ...
    });
    workerThread.Start();
}

Summary table of differences:

Characteristic	Asynchronous programming	Multithreading
Goal	Non-blocking I/O operations	Parallel execution of computations
Thread management	Hidden, uses thread pool/IOCP	Explicit management by the developer
Synchronization complexity	Less, when using await	Higher, requires explicit synchronization
Main mechanisms	async/await, Task, TaskCompletionSource	Thread, ThreadPool, Parallel