jenkins.util

Class MemoryReductionUtil

java.lang.Object

jenkins.util.MemoryReductionUtil

public class MemoryReductionUtil
extends Object

Utilities to reduce memory footprint

Author:

Sam Van Oort

Field Summary

Fields

Modifier and Type	Field and Description
static String[]	EMPTY_STRING_ARRAY Empty string array, exactly what it says on the tin.

Constructor Summary

Constructors

Constructor and Description
MemoryReductionUtil()

Method Summary

Modifier and Type	Method and Description
static Map	getPresizedMutableMap(int elementCount) Returns a mutable HashMap presized to hold the given number of elements without needing to resize.
static String[]	internInPlace(String[] input) Returns the input strings, but with all values interned.
static int	preallocatedHashmapCapacity(int elementsToHold) Returns the capacity we need to allocate for a HashMap so it will hold all elements without needing to resize.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_STRING_ARRAY

public static final String[] EMPTY_STRING_ARRAY

Empty string array, exactly what it says on the tin. Avoids repeatedly created empty array when calling "toArray."

Constructor Detail

MemoryReductionUtil

public MemoryReductionUtil()

Method Detail

preallocatedHashmapCapacity

public static int preallocatedHashmapCapacity(int elementsToHold)

Returns the capacity we need to allocate for a HashMap so it will hold all elements without needing to resize.

getPresizedMutableMap

public static Map getPresizedMutableMap(int elementCount)

Returns a mutable HashMap presized to hold the given number of elements without needing to resize.

internInPlace

public static String[] internInPlace(String[] input)

Returns the input strings, but with all values interned.