/spreadplayers command causes lag

When I use a spreadplayers command like

/spreadplayers ~ ~ 50 100000 @a

(max range : 100000, very large)
for spreading players far away, the PC starts lagging and uses all of the system's memory.
The memory usage indicates 100% usage. This happens both when I try to to execute the command via console and command block.

I think it is related chunk loading problem.