# Package org.apache.sysds.runtime.compress.utils

Class Summary
DArrCounts
DblArray: Helper class used for bitmap extraction.
DblArrayCountHashMap
DblArrayIntListHashMap
DCounts
DoubleCountHashMap
DoubleIntListHashMap: This class provides a memory-efficient replacement for `HashMap<Double,IntArrayList>` for restricted use cases.
IntArrayList: This class provides a memory-efficient replacement for `ArrayList<Integer>` for restricted use cases.
Util