The getBytes performance deterioration in 1.4.2_0X has been found
comparing with that in 1.3.1_0X, especially with MS932 encoding.

REPRODUCE :

  (1) Compile the attached program, getBytes_7f.java
  (2) Invoke 3 encoding set for performance comparison like
      "java getBytes_7f ISO-8859-1",
      "java getBytes_7f UTF-8",
       and "java getByte_7f MS932".
       Then "time : XXXX" message will show up.

CONFIGURATION :
 OS:Windows XP(SP1, Japanese)
 CPU:Pentium4 1.4[GHz]
 MEM:384[MB]
 JRE/JDK : 1.4.2/1.5

BEHAVIOR:
 Please see the following messages.

===========1.3.1_0X ============================
K:\nio-perf\getBytes>java -version
java version "1.3.1_09"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_09-b03)
Java HotSpot(TM) Client VM (build 1.3.1_09-b03, mixed mode)

K:\nio-perf\getBytes>java getByte_7f ISO-8859-1
time : 340

K:\nio-perf\getBytes>java getByte_7f UTF-8
time : 370

K:\nio-perf\getBytes>java getByte_7f MS932
time : 460

=========== 1.4.2_02 =================
K:\nio-perf\getBytes>java -version
java version "1.4.2_02"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_02-b03)
Java HotSpot(TM) Client VM (build 1.4.2_02-b03, mixed mode)

K:\nio-perf\getBytes>java getByte_7f ISO-8859-1
time : 180

K:\nio-perf\getBytes>java getByte_7f UTF-8
time : 231

K:\nio-perf\getBytes>java getByte_7f MS932
time : 822
=========== 1.5.0 Beta===============================================
K:\nio-perf\getBytes>
K:\nio-perf\getBytes>java -version
java version "1.5.0-beta2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta2-b38)
Java HotSpot(TM) Client VM (build 1.5.0-beta2-b38, mixed mode)

K:\nio-perf\getBytes>java getByte_7f ISO-8859-1
time : 200

K:\nio-perf\getBytes>java getByte_7f UTF-8
time : 250

K:\nio-perf\getBytes>java getByte_7f MS932
time : 581

=======================================================================

USERS COMMENT :
  The perf. for ISO-8859-1 or UTF-8 seems reasonable, but that for extension-
encoding is worse.

REQUEST :
  SUN should improve the performance of nio for extention-encoding in 1.4.2.
  It take too much time in 1.4.2 comparing with 1.3.1 in extension-encoding.
=============================================================================