Concurrency vs. Parallelism

Concurrency vs. Parallelism

In this lesson — part of Concurrency Basics — you'll learn concurrency vs. parallelism in Objective-C and why it matters in real work.

Why it matters

Modern programs wait on networks and disks — async lets them stay responsive.

Key ideas

• Blocking vs. non-blocking
• Callbacks, promises, async/await
• Concurrency vs. parallelism
• Error handling in async code

In practice

Here's the idea in pseudocode — the exact syntax varies by language:

// Objective-C: await a result
result = await fetch(url)

Try it yourself

Exercise: In Objective-C, fetch two things concurrently and combine the results.

Recap

You now understand concurrency vs. parallelism and can apply it in Objective-C. Mark this lesson complete and continue to the next one.