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1. I use fast trig, but initially Tomcat eats less than 100 mb of memory
2. I do not use multi-dimensional arrays
3. I use Rednaxela's kD-tree and own R-tree. Splitting in r-tree is fairly well
4. I keep static links only to movement & gun logs.

I tried to change double to float everywhere, but it has not any influence on memory usage. My problem, that i have 16 logs with visit data, 16 logs with hit data & 6 logs with tick data, but i can not find way, how to reduce it without APS degradation. But any way, thanks for response:)