Determine the optimal size for array with respect to the JVM's memory granularity

Question

When creating the backing array for (e.g.) a collection, you do not really care about the exact size of the array you create, it only needs to be at least as large as you ca

Answer 1

When dynamically sized collections increase the size of their backing array, they do not add a small amount to its size, they increase in proportion. Doubling is a common choice. They do this because it gives better performance. The tiny adjustment you suggest would not be worth the effort.