What are the advantages and disadvantages of using the async/await construct in programming?

The async/await construct allows writing asynchronous code that looks like synchronous code, which significantly simplifies reading and maintaining the code.

Advantages:

• Improves readability and structure of asynchronous code.
• Simplifies error handling through standard try/catch constructs.
• Helps avoid "callback hell" (deeply nested callbacks).
• Enables efficient resource utilization without blocking the main thread.

Disadvantages:

• May lead to non-obvious performance issues if used improperly (e.g., excessive task creation).
• Requires support from the runtime environment (e.g., iOS 13+ for Swift async/await).
• Sometimes harder to debug, especially with complex chains of asynchronous calls.

Example in Swift:

func fetchData() async throws -> Data {
    let url = URL(string: "https://example.com/data.json")!
    let (data, _) = try await URLSession.shared.data(from: url)
    return data
}