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Bug
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Resolution: Unresolved
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P4
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None
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1.4.0
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x86
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windows_nt
This bug is being filed to take over the small-image part of bug 4276423.
That original bug was filed against all image copies to the screen in JDK 1.2.
Since then, we have implemented faster image copies through hardware accelerated
images (on win32) and have seen substantial improvements in these operations
(vs. jdk 1.1, 1.2, and 1.3).
however, there are still performance improvements that would be nice for
small (20x20 and less) image sizes. Here are some performance numbers
from some testing for that other bug report:
jdk1.1:
20x20 37,724,773
100x100 36,661,107
300x300 36,808,163
jdk1.2:
20x20 3,631,375
100x100 31,629,213
300x300 43,824,489
jdk1.3:
20x20 3,728,680
100x100 33,635,275
300x300 42,096,774
jdk1.4:
20x20 5,750,953
100x100 108.602,065
300x300 165,263,578
We should determine the bottlenecks for small image performance and try
to eliminate them.
- relates to
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JDK-4276423 drawImage of an offscreen image to the screen much slower in JDK 1.2
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- Resolved
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