Name: gm110360			Date: 08/02/2002


FULL PRODUCT VERSION :
Solaris 64-bit:

java version "1.4.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0_01-b03)
Java HotSpot(TM) Client VM (build 1.4.0_01-b03, mixed mode)

(The problem also appears in he 32-bit JDK).

Linux:

java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)


FULL OPERATING SYSTEM VERSION :
SunOS averia 5.8 Generic_108528-09 sun4u sparc SUNW,UltraAX-i2

ADDITIONAL OPERATING SYSTEMS :
Linux fora 2.4.18 #3 dl jun 3 14:55:25 CEST 2002 i686
unknown unknown GNU/Linux


A DESCRIPTION OF THE PROBLEM :
URLEncoder.encode shows severely degraded performance when
run concurrently by several threads.


REGRESSION.  Last worked in version 1.3.1

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the attached program under 1.4.1_02.

Using the 2-parameter encode() method will show similar
results (although you won't be able to compare with 1.3.1's
behaviour).

You can also observe this by trying to run a multi-threaded
test on Jakarta JMeter. See
http://nagoya.apache.org/bugzilla/show_bug.cgi?id=11369 for
details.

EXPECTED VERSUS ACTUAL BEHAVIOR :
Expected:

$ time ~/jdk1.3.1/bin/java URLEncode

real
0m2.424s
user
0m1.040s
sys
0m0.100s

Actual:

$ time ~/j2sdk1.4.0/bin/java URLEncode

real
0m12.108s
user
0m5.330s
sys
0m0.290s


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class URLEncode extends Thread {
  public static void main(String args[]) {
    for (int i=0; i<10; i++) {
      new URLEncode().start();
    }
  }

  public void run() {
    for (int i=0; i<1000; i++) {
      String e= java.net.URLEncoder.encode("Aix? ?s una prova.");
    }
  }
}


---------- END SOURCE ----------

Release Regression From : 1.3.1_04
The above release value was the last known release where this 
bug was known to work. Since then there has been a regression.

(Review ID: 160216) 
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