===================================================================
Please evaluate the attached programs.

These are 2 applets, which switch to another page each other
by using showDocument().

Please Repeat several times to change document
by clicking the button.
We can easily see Free Memory decreasing little by little.

1. Configration

  - PlugIn : Java PlugIn 1.1.3
  - JDK : JDK 1.1.8
  - Browser: Internet Explorer(4.01)
  - OS : Windows NT(SP3)/95(OSR2) (whole japanese)
  - Memory : Memory 128 [MBytes]
  - processor : Pentium II 400[MHz]
  
2. Reproduce

  (1) Change the option of Internet Explorer
     - Select [view]- [internet option]
     - Click the "detail setting" tag
     - Check the "Java console enabled"
     
     These applets show the usage of memory to Java console
     
  (2) Compile the attached java codes with JDK1.1.8
  (3) Modify the attached html files
       ( Parm name : URLadress )
  (4) Open a1.html files
      -> you can see the "applet2" button
  (5) Click the button
      -> you can see another java applet showing up
         and "applet1" button
  (6) Click the button
      -> you can see (2)
      
   Please repeat (2)-(4), so you can see the free memory
   is decreasing gradually.
   
   
3. Results

   The followings are the result of trial on winNt and Win95.
   
   Note)
    - Use Mem. is the result of Total Mem. minus Free Mem.
   
   3.1 On WinNT
   
     NUm. of
       clicking Free Mem. Use Mem. Total Mem. [bytes]
    ------------+-------------+--------------+------------
             1 575648 472920 1048568
            10 526008 522560 1048568
            20 478760 569808 1048568
            30 430416 618152 1048568
            40 379232 669336 1048568
            50 1377928 719216 2097144
            60 1329486 767656 2097144
            70 1280656 816488 2097144
            80 1234152 862992 2097144
            90 1185352 911792 2097144
           100 1136976 960168 2097144
           
           
   3.2 On Win95
   
     NUm. of
       clicking Free Mem. Use Mem. Total Mem. [bytes]
    ------------+-------------+--------------+------------
             1 18262632 611728 18874360
            10 18214288 660072 18874360
            20 18165024 709336 18874360
            30 18114600 759760 18874360
            40 18064200 810160 18874360
            50 18015200 859160 18874360
            60 17966160 908200 18874360
            70 17917016 957344 18874360
            80 17867976 1006384 18874360
            90 17817576 1056800 18874360
           100 17769856 1104504 18874360
           
           
           
   3.3 Reported result by Lisencee
   
     On licensee's site, the results are as follows.
     
     NUm. of
       clicking Free Mem. Use Mem. Total Mem. [bytes]
    ------------+-------------+--------------+------------
             1 376480 672088 1048568
            10 1328320 768824 2097144
            20 1250384 846760 2097144
            30 1207528 889616 2097144
            40 1100520 996624 2097144
            50 1054656 1042488 2097144
            60 982328 1114816 2097144
            70 906456 1190688 2097144
            80 801240 1295904 2097144
            90 757216 1339928 2097144
           100 683560 1413584 2097144
           
           
4. Notes

   The attached applets has a few objects, "button" and "label".
   So, the decreasing rate of free memory looks slow.
   
   However, actual Licensee's applet has a lot of objects,
   like "button", "text Box", "Menu".....and so on.
   So, the applications or system hang easily.


tbaba@japan 2000-02-28
==========================================================================