<Improving Time Efficiency on two custom List in K...

# stackoverflow

[user]

Improving Time Efficiency on two custom List in KOTLIN
There are two lists:
val listA:List
val listB:List


data class Amodel(val id:Int,var isUsed:Boolean=false)


Need to update listA isUsed =true based on the int id of the listB
What I'm doing now:

listB.foreach(){
//here i'm updating but it's taking too much time w.r.t time efficiency.
}


any GOOD solution.