And the CPU load is due to the AI of Nullkiller, which uses parallel computing. That's why the load can reach 100%. (But it depends on the map; it won't be the case for every map).
And it consumes a lot of memory; I saw 2.4 GB on the client in the task manager for HL maps.
За то что нейтралы не бегают за единичкой, для меня это уже стоит того