5 Must-Know Kotlin Performance Tips I Wish I Learned Sooner!

Discover five game-changing performance tips to speed up your Kotlin code.

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In this article we will see 5 tips to optimised your kotlin code efficiently.

1. Use inline for High-Order Functions to Reduce Overhead

The inline keyword in Kotlin is used to optimise higher-order functions by reducing the runtime overhead of function calls.

It instructs the compiler to insert the function’s body directly into the places where the function is called, rather than creating a separate function call.

inline fun measure(call:()->Unit){
    call()
}

measure {
        println("Called...")
    }

when you run the above code , only function body is called rather than the whole function.

When to Use and When to Avoid inline

✅ Use inline when:

• You have a small function with lambda parameters.
• You want to reduce function call overhead.
• You are using generics and need type information at runtime (reified).