[Verse 1] When your code needs to wait for something slow Like fetching data or files to load Don't let your program freeze and stop the flow There's a better way down this async road Functions marked as async can pause and yield While other tasks keep running in the field They return a Future that's not yet real Until you await to make the magic seal [Chorus] Async await, don't make me wait Your function sleeps but others stay awake Async await, cooperative fate The runtime switches tasks while some ones wait Mark it async, then await the call Non-blocking code that serves them all [Verse 2] Inside an async function you can see Await keywords that pause so gracefully The function yields control temporarily While futures resolve eventually You cannot call await in normal code Only async functions know this mode The compiler checks each await you wrote Making sure you're on the async boat [Chorus] Async await, don't make me wait Your function sleeps but others stay awake Async await, cooperative fate The runtime switches tasks while some ones wait Mark it async, then await the call Non-blocking code that serves them all [Bridge] Futures are lazy until you poll Executors make the whole thing roll Tokio runtime takes control Green threads dancing, that's the goal When you await a future's end Your function pauses, doesn't bend The runtime finds another friend To run until they too suspend [Chorus] Async await, don't make me wait Your function sleeps but others stay awake Async await, cooperative fate The runtime switches tasks while some ones wait Mark it async, then await the call Non-blocking code that serves them all [Outro] So when you need concurrency Remember async's the key Await the futures patiently That's Rust's async harmony
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