Uploaded image for project: 'JDK'
  1. JDK
  2. JDK-6581899

JTextField & JTextArea - Poor performance with JRE 1.5.0_08

    XMLWordPrintable

    Details

    • Subcomponent:
    • Resolved In Build:
      b36
    • CPU:
      x86
    • OS:
      windows_xp
    • Verification:
      Not verified

      Backports

        Description

        FULL PRODUCT VERSION :
        java version "1.5.0_08"
        Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_08-b03)
        Java HotSpot(TM) Client VM (build 1.5.0_08-b03, mixed mode, sharing)


        ADDITIONAL OS VERSION INFORMATION :
        Microsoft Windows XP, Professional, Version 2002, SP2.

        EXTRA RELEVANT SYSTEM CONFIGURATION :
        Intel(R) Pentium(R) 4 CPU, 2.4 GHz, 1.00 GB of RAM

        A DESCRIPTION OF THE PROBLEM :
        Our application is completely applet-based with java swing UI. The application had been recently migrated from JRE 1.4.1_02 to 1.5.0_08.
        Since the migration, it has been observed that the text field and text area components show poor performance when typing some input text the on fields. The problem occurs in IE6 and IE7 browsers.

        When typed some input in the text field, the component seems to hang for a short time before it reponds. The characters does not appear in the text field as and when a character is typed. The character appears in the field after a bit-while. Note that the field has no event listeners.

        The time taken for a typed character to become visible on the field is approximately 0.010 ms with JRE 1.4 and 0.390 ms with JRE 1.5. This means, the performance degraded by nearly 40 times.

        The delay is proportional to number of swing components in the screen and the complexity of the layout. More the number of swing UI components, much easier to replicate the issue.

        Replacing the JTextField with JFormattedTextField did not help. Changing the windows appearance from "XP style" to "classic style" did not help.

        The problem could not be replicated in Mozilla browser and applet viewer.

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        Launch TestApplet (source code attached) in internet explorer v6/7 and type some input in the text fields. The fields will respond sluggishly.

        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        The typed text should appear on the fields without delays.
        ACTUAL -
        When typed some input in the text field, the component seems to hang for a short time before it reponds. The characters does not appear in the text field as and when a character is typed. The character appears in the field after a bit-while. Note that the field has no event listeners.

        ERROR MESSAGES/STACK TRACES THAT OCCUR :
        No errors. No excpetions.

        REPRODUCIBILITY :
        This bug can be reproduced always.

        ---------- BEGIN SOURCE ----------
        ----------------------------------------------------------------------------------------------------
        package test;

        import javax.swing.JApplet;
        import javax.swing.JPanel;
        import javax.swing.JTextField;

        public class TestApplet extends JApplet {

        private JPanel ivjJAppletContentPane = null;

        public void init() {
        setContentPane(getJAppletContentPane());
        setName("Test Applet");
        }

        private javax.swing.JPanel getJAppletContentPane() {
        if (ivjJAppletContentPane == null) {
        try {
        ivjJAppletContentPane = new javax.swing.JPanel();
        ivjJAppletContentPane.setName("JAppletContentPane");
        ivjJAppletContentPane.setBorder(new javax.swing.border.EtchedBorder());
        ivjJAppletContentPane.setLayout(null);
        for (int i=1; i<2000; i++) {
        JTextField ivjDescField = new javax.swing.JTextField();
        ivjDescField.setName("DescField");
        ivjDescField.setBounds(20, i*20, 215, 20);
        getJAppletContentPane().add(ivjDescField, ivjDescField.getName());
        }
        } catch (java.lang.Throwable ivjExc) {
        System.out.println(ivjExc);
        }
        }
        return ivjJAppletContentPane;
        }
        }

          To test the applet in JRE 1.5, use the below HTML.
        ----------------------------------------------------------------------------------------------------

        <HTML>
        <HEAD>
        <TITLE>AIQ</TITLE>
        </HEAD>
        <BODY>
        <body bgcolor=#c0c0c0>
        <div align="center">
        <OBJECT
        object classid ="clsid:CAFEEFAC-0015-0000-0008-ABCDEFFEDCBA" WIDTH = "300" HEIGHT = "10000" >
        <PARAM NAME = CODE VALUE = "test.TestApplet.class" >
        <PARAM NAME = ARCHIVE VALUE = "../jar/AIQApplet.jar" >

        <PARAM NAME="type" value="application/x-java-applet;version=1.5.0_08">
        <PARAM NAME="scriptable" value="false">
        </OBJECT>
        </div>
        </BODY>
        </HTML>

        ----------------------------------------------------------------------------------------------------

          To test the applet in JRE 1.4, use the below HTML.

        <HTML>
        <HEAD>
        <TITLE>AIQ</TITLE>
        </HEAD>
        <BODY>
        <body bgcolor=#c0c0c0>
        <div align="center">
        <OBJECT
        object classid ="clsid:CAFEEFAC-0014-0001-0002-ABCDEFFEDCBA" WIDTH = "300" HEIGHT = "10000" >
        <PARAM NAME = CODE VALUE = "com.aig.aiq.userservices.swing.TestApplet.class" >
        <PARAM NAME = ARCHIVE VALUE = "../jar/AIQApplet.jar" >

        <PARAM NAME="type" value="application/x-java-applet;version=1.4">
        <PARAM NAME="scriptable" value="false">
        </OBJECT>
        </div>
        </BODY>
        </HTML>
        ----------------------------------------------------------------------------------------------------
        ---------- END SOURCE ----------

        CUSTOMER SUBMITTED WORKAROUND :
        No work around found.

          Attachments

            Issue Links

              Activity

                People

                Assignee:
                dcherepanov Dmitry Cherepanov
                Reporter:
                ndcosta Nelson Dcosta (Inactive)
                Votes:
                0 Vote for this issue
                Watchers:
                1 Start watching this issue

                  Dates

                  Created:
                  Updated:
                  Resolved:
                  Imported:
                  Indexed: