Package org.apache.sysds.runtime.util

Class LongLongDoubleHashMap

java.lang.Object

org.apache.sysds.runtime.util.LongLongDoubleHashMap

public class LongLongDoubleHashMap
extends Object

This native long long - double hashmap is specifically designed for ctable operations which only require addvalue - extract semantics. In contrast to a default hashmap the native representation allows us to be more memory-efficient which is important for large maps in order to keep data in the caches and prevent high-latency random memory access.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	LongLongDoubleHashMap.ADoubleEntry
static enum	LongLongDoubleHashMap.EntryType

Constructor Summary

Constructors

Constructor	Description
LongLongDoubleHashMap()
LongLongDoubleHashMap(LongLongDoubleHashMap.EntryType etype)

Method Summary

Modifier and Type	Method	Description
void	addValue(long key1, long key2, double value)
Iterator<LongLongDoubleHashMap.ADoubleEntry>	getIterator()
int	getNonZeros()
int	size()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

LongLongDoubleHashMap

public LongLongDoubleHashMap()

LongLongDoubleHashMap

public LongLongDoubleHashMap(LongLongDoubleHashMap.EntryType etype)

Method Details

size

public int size()

getNonZeros

public int getNonZeros()

addValue

public void addValue(long key1,
 long key2,
 double value)

getIterator

public Iterator<LongLongDoubleHashMap.ADoubleEntry> getIterator()