Should create a big canvas from multiple small png pictures
How to do this rendering as fast as possible. I tried renderingHints but it did not boost anything.
Sourcefiles are small png-with-alpa, target file is png-no-alpha.

example program
This will draw same picture from left-to-right-up-to-down, overlapping each. Just a benchmarking code.
LargeCanvas.java.txt
Celeron 500Mhz, 512MB
LargeCanvas test: millis
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no hints  : 74588
speedHints: 74547
type USHORT_555_RGB, no hints: 80000