efficiency of JList setElementAt()

I have an application that displays about 130 text lines in a scrollable
JList via the DefaultListModel. Approximately 1 entry is modified each
second which is done by determining the position of the item and invoking
setElementAt of the DefaultListModel object. My Athlon XP-1800+ machine
consumes 31% of the system CPU when these operations occur but if I execute
all the program logic with the single exception of the setElementAt call, it
consumes only 3% of the CPU. Is it reasonable that modifying one element of
a list once a second would consume so much CPU? Also, the modification time
increases approximately linearly with list size. If I make the list 1/2 the
size about 19% of the CPU is consumed.

It seems that if my list size grows, frequency of updates increases, or if I
operate more than a single list at a time (all of which are planned), I will
drag even a quite fast machine to its knees. Are there more efficient
alternatives available? The target machine is Windows, JRE 1.4.2_08 and the
development environment is Eclipse 3.1.

RC


.

Relevant Pages

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