Programming Tutorials Browser Tutorials Articles Struts Tutorials Hibernate Tutorials

Search: 

  Tutorial: Garbage collection and performance

Garbage collection and performance The past two installments of Java theory and practice have discussed various techniques for garbage collection and the basics of the JDK 1.4.1 garbage collectors. The 1.0 and 1.1 JDKs used a mark-sweep collector, which

Tutorial Details:

In HotSpot JVMs (Sun JDK 1.2 and later), things got a lot better -- the Sun JDKs moved to a generational collector. Because a copying collector is used for the young generation, the free space in the heap is always contiguous so that allocation of a new object from the heap can be done through a simple pointer addition, as shown in Listing 1. This makes object allocation in Java applications significantly cheaper than it is in C, a possibility that many developers at first have difficulty imagining. Similarly, because copying collectors do not visit dead objects, a heap with a large number of temporary objects, which is a common situation in Java applications, costs very little to collect; simply trace and copy the live objects to a survivor space and reclaim the entire heap in one fell swoop. No free lists, no block coalescing, no compacting -- just wipe the heap clean and start over. So both allocation and deallocation costs per object went way down in JDK 1.2.


 

Read Tutorial at: Click here to view the tutorial

Rate Tutorial:
Garbage collection and performance

View Tutorial:
Garbage collection and performance

Related Tutorials:

Displaying 1 - 50 of about 576 Related Tutorials.

Java: Garbage Collection
Java: Garbage Collection Java: Garbage Collection Garbage collection is the process of automatically finding memory blacks.... Automatic garbage collection When there are no longer any references to a memory block
 
Code for Garbage Collection
Java Garbage Collection,Garbage Collection in Java,Garbage Collection Example Java Code for Garbage Collection... of program will help you in forcing the garbage collection. First of all we have
 
Code for Garbage Collection
Java Garbage Collection,Garbage Collection in Java,Garbage Collection Example Java Code for Garbage Collection... of program will help you in forcing the garbage collection. First of all we have
 
Advantages and Disadvantages of the Collection Framework
Advantages and Disadvantages of the Collection Framework Advantages and Disadvantages of the Collection Framework... Collection Framework. A collection is simply an object that groups multiple
 
Collection of Large Number of Java Sample Programs and Tutorials
In Collection framework, we are able to improve the performance hashing... Collection of Large Number of Java Sample Programs and Tutorials Collection of Large Number of Java Sample Programs and Tutorials
 
Web Performance Analyzer
Web Performance Analyzer Web Performance Analyzer...;   Web Performance Analyzer Web Performance Analyzer... you to measure, analyze, estimate and track baseline web page performance
 
Collections Framework Enhancements
; In Collection framework, we are able to improve the performance hashing function that is used by java.util.HashMap. It provides some new Collection interfaces also... of the elements that held in this Collection. Above Constructor is used to make
 
Collection Interface
Java: Collection Interface Java NotesCollection Interface The Collection interface is the parent... for identifiers in the table below: Collection coll; boolean b; Object obj; int i
 
Collection Interface
Java: Collection Interface Java NotesCollection Interface The Collection interface is the parent... for identifiers in the table below: Collection coll; boolean b; Object obj; int i
 
Collection to Array
Collection to Array in Java Converting an Array to a Collection Collection to Array     ... below illustrates the conversion of  a collection into a array
 
Creating a Copy of a Collection
Creating a Copy of Collection,How to Create Copy of Collection,Java Copy Collection Example Creating a Copy of a Collection... the collection. The copied collection contains the reference to the object
 
Convert Collection to Array
Convert Collection to Array Convert Collection...;   In this section, you will learn to convert Collection data... Collection data to an Array. Here we have taken an collection of weekdays which
 
Sorting elements of a Collection
sorting collection,sorting collections,Sorting elements of a Collection Sorting elements of a Collection  ...; This section gives you the best illustration for sorting elements of a Collection. You
 
Making a Collection Read-Only
Making a Collection Read-Only Making a Collection...;    This section describes you how to make a collection read-only. In this section, list (component of the collection) has been
 
Collection Iterate Example
Collection Iterate Example Collection Iterate Example                        
 
BI: Improving performance in financial service
BI: Improving performance in financial service GPS Capability,GPS Capabilities BI: Improving performance in financial... management is the evaluation of company by rating agency as the performance
 
Converting an Array to a Collection
Converting an Array to a Collection Converting an Array to a Collection Converting an Array to a Collection... is the illustration for the conversion from the an array to a collection
 
Converting Collection to an Array
Converting Collection to an Array Converting Collection to an Array        ... from the collection to an array. In this section, you will learn how to do
 
Collection Interfaces
Collection Interfaces, Java SE 6 Tutorials Collection Interfaces        ... collection interfaces hierarchy. Table of the ordered and unordered
 
Test Performance Tools Platform (TPTP) Training
Test Performance Tools Platform (TPTP) Training Test Performance Tools Platform (TPTP) Training   ... stands for Test & Performance Tools Platform. This tool enables
 
Hibernate 3.1.1 Released
Tutorials Page Hibernate is a powerful, high performance object/relational... collection handling use of join fetch on collection through scrollable resultsets
 
Collections Framework
; Java provides the Collections Framework. In the Collection Framework, a collection represents the group of the objects. And a collection framework.... The collection framework provides a standard common programming interface to many
 
Collection of Large Number of Java Interview Questions!
collection of Interview questions, you can discuss interview topics questions...; Servlet Interview Questions Collection... the Java Questions which are commonly asked. Our collection
 
JSTL: String Collection
JSTL: String Collection JSTL: String Collection..." prefix="c" %> <html> <head> <title>String Collection Example</title> </head> <body> <strong>Collection Example<
 
Apache Solr 1.2 released
performance search server with a web-services like API. It is based on on Lucene... collection via XML over HTTP. The collection is queried via HTTP to receive an XML... Text Analysis Highly Configurable and User Extensible Caching Performance
 
TheOpenCD is a collection of high quality Free and Open Source Software
TheOpenCD is a collection of high quality Free and Open Source Software TheOpenCD v2.0 Now Available TheOpenCD v2.0 TheOpenCD is a collection of high quality Free and Open Source Software. The programs
 
Java 6.0 Collection Framework
Java 6.0 New Features,Java Collection Framework,Java 6.0 Features,Introduction to Java 6 Java 6.0 Collection Framework.... With the help of this collection we can add or remove elements at both the ends
 
Alvicom LoadManager
, Stability and Performance criteria and has been used successfully by banks, telecom... or unreliably set-up in other commercial or free Load/Performance tools... and then literally re-set the tool to offer you the right performance and to provide
 
OpenTime
collection brought to you by Mirasol Op'nWorks. With OpenTime you benefit... the most advanced and high performance Java? technologies available namely Eclipse
 
Example to show Collection exception in java
Java Exception Example to show Collection exception in java        ...; how to handle collection exceptions appropriately in your programs and designs
 
Database books Page10
database applications. It consists of a high-performance relational database management system (RDBMS), which runs database servers, and a collection... called relations. A relational database consists of a collection of tables
 
Servlet Interview Questions
; Collection of large number of Servlet Interview Questions. These questions... in the explosion of the Internet, its performance, scalability and reusability issues... of servlets. Performance Due to interpreted nature of java, programs written
 
Servlet Interview Questions
; Collection of large number of Servlet Interview Questions. These questions... in the explosion of the Internet, its performance, scalability and reusability issues... of servlets. Performance Due to interpreted nature of java, programs written
 
SortedMap (interface) example in java Collection Framework
SortedMap, Java Sorted Map Example SortedMap (interface) example in java Collection Framework                 
 
EJB Books
Filled with practical advice for good design and performance and plenty of useful..., and a collection of EJB tips and strategies, and other topics such as Build-System best... will examine how these alternatives affect testing, performance, and scalability
 
AppPerfect Code Analyzer
optimization, garbage collection, memory management, coding standards violations.... Locating and fixing performance problems during source code development time is arguably the cheapest way to resolve performance problems. As your project go past
 
Buy Slackware 10.0 in India from us. Slackware 10.0 is available with us.
10 CD's Slackware 10.0 contains the GNOME 2.6.1 (including a collection... uses the 2.4.26 kernel, Which brings advance performance features
 
Eclipse Plugin-Rich Client Applications
collection. It is available as an Eclipse plugin and makes use of the JFace/SWT... increases the performance and stability of your Lotus Notes/Domino environment
 
Hibernate 3.1.2 Released
performance object/relational persistence and query service. Hibernate lets you develop
 
Hibernate 3.1.3 Released
performance object/relational persistence and query service. Hibernate lets you develop
 
Open Source Database
To date, there has been no easy way to benchmark the performance... offers excellent concurrency, high performance, and powerful language support... on enterprise databases with its high performance in real time environments, Compiere
 
Set interface
Collection methods. HashSet<E> class constructors HashSet<E>... a new HashSet with elements from the Collection coll SortedSet interface methods... Collection coll using natural ordering. tset = new TreeSet<E>(sset
 
JSF Interview Questions
;   Collection of JSF (Java Server Faces) Interview
 
Core Java Interview Questions!
; Question: Explain garbage collection? Answer: Garbage collection is one of the most important feature of Java. Garbage collection is also called...: How you can force the garbage collection? Answer: Garbage collection
 
Open Source JMS
* Administration GUI * XML-based configuration files * In-memory and database garbage collection * Automatic client disconnection detection .     .... JMS4Spread utilizes the Spread toolkit, a high performance group communication
 
Introduction to Collections API
About Collections,Collection Java,Collection API,Introduction to Collections..., LinkedLists, HashSets, etc. A collection is simply an object that groups multiple...; constructors should be provided by all the general-purpose Collection implementation
 
Open Source CD
TheOpenCD is a collection of high quality Free and Open Source Software. The programs...;  TTCS OSSWIN CD The TTCS OSSWIN CD is a collection of over 100 Free... Software CD The Open Source Software CD is a large collection of high-quality
 
Draw a Mandelbrot
. A Mandelbrot is a collection of points in the plane whose boundary forms a fractal
 
RR4 Linux 3.0 Beta 0 XGL Edition has been released
. Flexibility, beauty, stability and extreme performance are all hallmarks of the RR4... with performance patches; XGL and Compiz (0.0.7 - opacity plugin included) for both GNOME... on Gentoo unstable. Flexibility, Beauty, Stability and Extreme Performance are all
 
HashSet Example
Collection Examples,HashSet Example,HashSet Example in Java,HashSet Collection HashSet Example   ..., remove and iterate the values of collection. A HashSet is a collection set
 
Site navigation
 

 

Send your comments, Suggestions or Queries regarding this site at roseindia_net@yahoo.com.

Copyright © 2006. All rights reserved.