Well, to be honest to everybody without 64 bit computer. Such operation is possible also with J32. The bigger integer takes some of the advantage of J64. Mapped files is maybe not the best way to handle big arrays J64. This needs more experimenting.

At 10:06 30.12.2006, Anssi wrote:
Thank you for the tip. Now it works. This is fun to say +/A to array of size 200000*1200. Fast testing shows that having 4G physical memory I can allocate 2G mapped file. What if I had 8G memory is the limit then be 6G?

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