[Bug awt/23536] New: Toolkit.createImage() is extremely slow

[hendrich at informatik dot uni-hamburg dot de]

While loading images from files via Toolkit.createImage( filename )
is pretty fast in current classpath (kudos Sven!), the remaining
variants of createImage() are still incredibly slow.

Run the attached testcase on any test image, preferably a large image
like a 4 Megapixel (or above) digicam image. Example timings on my
Athlon 2600+ under SuSE Linux with JDK 1.4.2 and Classpath CVS 20050823 
with jamvm 1.3.1:

java PRxxxxx /home/hugo/img_3000.jpg
-#- createImage (file) took     2 msecs.
-#- MediaTracker (file) took    227 msecs.
-#- createImage (URL) took      0 msecs.
-#- MediaTracker (file) took    295 msecs.
-#- createImage (byte[]) took   0 msecs.
-#- MediaTracker (file) took    223 msecs.

jamvm -mx300m PRxxxxx /home/hugo/img_3000.jpg
-#- createImage (file) took     42 msecs.
-#- MediaTracker (file) took    0 msecs.
-#- createImage (URL) took      8054 msecs.
-#- MediaTracker (file) took    0 msecs.
-#- createImage (byte[]) took   8037 msecs.
-#- MediaTracker (file) took    0 msecs.

In other words, Classpath+jamvm is faster for createImage(file), but
nearly 40 (fourty) times slower for URLs and raw bytes.

Also note that Classpath somehow seems to already 'MediaTrack' the 
Images before they are used.

-- 
           Summary: Toolkit.createImage() is extremely slow
           Product: classpath
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: awt
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hendrich at informatik dot uni-hamburg dot de
                CC: bug-classpath at gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23536