CDV ❯ StringBuilder/StringBuffer is slow in JDK 1.6

• Type: Bug
• Status: Closed
• Priority: 2 Major
• Resolution: Fixed
• Component/s: DSO:L1
• Labels:

• Assignee: teck
• Reporter: teck
• Created: January 16, 2007
• Votes: 0
• Watchers: 0
• Updated:

  July 27, 2012
• Resolved:

  February 13, 2007

Description

StringBuilder.toString() (and probably other critical places) use the (char[], int, int) constructor of String. In 1.6, this string constructor uses a new method (Arrays.copyOfRange()) which ends up calling on the DSO ArrayManager.

The copyOfRange() methods in java.util.Arrays cannot ever be operating on a “shared” destination array when they call System.arraycopy() and thus do not need to go through ArrayManager.

A new test should be added for StringBuilder, much like com.tctest.StringBufferTest. At least one of the test methods should execute toString() in a loop to measure a speedup

Comments

Fiona OShea 2007-02-07

Updating Due date to last day of Moraga dev iteration