Bug ID: JDK-6809227 poor performance on Panel.Add() method in jdk6

JDK-6809227 : poor performance on Panel.Add() method in jdk6

Type: Task
Component: client-libs
Sub-Component: java.awt
Affected Version: 1.4.2,5.0,6

Priority: P2
Status: Closed
Resolution: Won't Fix
OS: generic,windows_2000,windows_xp
CPU: x86

Submitted: 2009-02-24
Updated: 2013-01-29
Resolved: 2013-01-29

Versions (Unresolved/Resolved/Fixed)

The Version table provides details related to the release that this issue/RFE will be addressed.

Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.

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JDK 7
7Fixed

Related Reports

Duplicate :	JDK-2172568 - REGRESSION: Panel.add(Component C) is slow with large number of Components
Duplicate :	JDK-5031147 - REGRESSION: Panel.add(Component C) is slow with large number of Components
Relates :	JDK-6852051 - Getting Null Pointer Exception when displaying message for TrayIcon on Opensolaris
Relates :	JDK-6829326 - Getting java.lang.NullPointerException: null pData while opening a File,Print,Page Dialog in Win
Relates :	JDK-4533021 - Container needs API to change Z-ordering of children
Relates :	JDK-6825362 - Avoid calling peer.setZOrder on Window instances
Relates :	JDK-6857365 - z-order implemenation is incomplete for a mixing case

Description

There is a performance regression introduced by the fix for
4533021 Container needs API to change Z-ordering of children
Testcase attached.

For more information please refer to
http://forums.java.net/jive/thread.jspa?threadID=57686&tstart=0

Comments

This is not a functional bug, but should be considered a performance tweak instead.
29-01-2013
EVALUATION Affects HW components only.
08-09-2009
EVALUATION Too risky for 6 update.
14-07-2009
SUGGESTED FIX http://sa.sfbay.sun.com/projects/awt_data/6u16/6809227/
04-03-2009
EVALUATION The current impelementation of the Z-order changes is quite expensive. Any addition (or removal) of a component to a container does restack all components of the container. The fix is to change only the Z-order of the particular component upon addition (or removal) of the component. It's a rather risky fix for 6u14 b04.
04-03-2009