适用于Android的内存友好型快速键值访问解决方案

I have an Android application that iterates through an array of thousands of integers and it uses them as key values to access pairs of integers (let us call them id's) in order to make calculations with them. It needs to do it as fast as possible and in the end, it returns a result which is crucial to the application.I have an Android application that iterates thr