The performance of extended encoding gets too worse in 1.4.1

I attached the sample code.
It measures the performance under the following 3 cases.

case1 : Specify the ISO-8859-1 in OutputStreamWriter and call its constructor.
case2 : Specify the MS932 in OutputStreamWriter and call its constructor.
case3 : Specify the ISO-8859-1 and UTF-8 and execute in turn

We expect the performance will be as follows.
  - case2 will the same to case1 or a little bit more than case1
  - case3 will be double of case1

In 1.3.1_04, the performance seems to the above, but in 1.4.0_01 and
1.4.1fcs, case2 and case3 seems to be too worse.
(Unit is  [msec])

           1.3.1_04       1.4.0_01       1.4.1
-----------------------------------------------------
case1        9257           8393          8714
case2       10024         287180       1966813
case3       18471          27365         27187



1. Reproduce

   Compile  the attached sample code by each version and invoke
   goedel[32]%  java charsettest

2. configration

SunOS jpe 5.8 Generic_108528-06 sun4u sparc SUNW,Ultra-80 (dual)

3. Note
  - This is tested on Japanese locale and japanese locale is in the case2.
    So, that is the serious problem for Japanese user(or user using other
    extended locale)
  - case3 is problem. Under Japanese environment, the changing encoding
    often happens. The case3 is the very case.
    Japanese user need the improvement of performance(decreasing the 
    switching overhead)

2002-09-25
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