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Argument could be converted to 'Set' to improve performance

Detects the function calls that could work faster with an argument converted to Set.

Operations like 'minus' or 'intersect' are more effective when their argument is a set. An explicit conversion of an Iterable<T> or an Array<T> into a Set<T> can often make code more effective.

The quick-fix adds an explicit conversion to the function call.


fun <T> f(a: Iterable<T>, b: Iterable<T>): Int = a.intersect(b).size

After the quick-fix is applied:

fun <T> f(a: Iterable<T>, b: Iterable<T>): Int = a.intersect(b.toSet()).size

Inspection Details

Available in:

IntelliJ IDEA 2023.3, Qodana for JVM 2023.3


Kotlin, @snapshot@

Last modified: 13 July 2023