[Bug swing/28028] New: JTextArea performance issue

[hendrich at informatik dot uni-hamburg dot de]

The performance of JTextArea operations is very bad when the text becomes
large; repainting and scrolling becomes intolerable at a few hundred lines,
even if only a dozen lines are visible.

(BTW: another clipRect issue?)

See attached testcase.

<java> HelpViewer <nlines>

         setText() times in msec

         jamvm   cacao  jdk142       

nlines
    10      12       21      6
   100     156      180     15
  1000    4708     2489     69
  2000   17357     8206    132
  3000   37922    17471    140
 10000      --   159881    480
100000      --       --   1654


-- 
           Summary: JTextArea performance issue
           Product: classpath
           Version: 0.92
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: swing
        AssignedTo: roman at kennke dot org
        ReportedBy: hendrich at informatik dot uni-hamburg dot de


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28028