I know this is an old issue, but with the talk of a new Java2D release,
I am wondering what will be done about the graphics.drawImage() speed
issue.
This is 4185726 on bug parade. It has been on the top for quite a
while. Ignoring the flame fest near the bottom of the issue, the rest
of the comments are valid -- using a Java 1.1 program in a Java2 VM is
extremely slow. Some people see the problem with Swing, others with
image-intensive applications.
I see a slow-down of 2 to 3 times in my applets, and I am producing a
medical imaging application. I have no alpha components, and
am using simple 8-bit IndexColorModel gray images. I have also tried
24-bit int[] RGB data with no alphas. There is the same problem.
Double buffering helps a little, but not as much as in JDK1.1 . It takes
a heck of a long time to draw that offscreen buffer, compared to what used
to be a blit in Java1.1 .
Perhaps Java2D-specific coding will help me some, I don't know, but
this is a serious issue. Nothing has been heard on it since
February, when a consultant at Sun ran my test app. through OptimizeIt,
and stuck some things in the evaluation section of the bug.
Can a Sun person comment on future improvements? Are there going to be
any?
Neil Hunt, Ph.D.
Mitra Imaging Inc.
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