size(100,100,100) program stuck problem

[HyperGroups]

mesh is bunny, resized into 100 bounds or 10 bounds.

('Program is manipulating model: ', 'bunny_100.stl') ('Program will create voxel in shape', (100, 100, 100)) Bounding box: xmax: 49.9831581116, ymax: 38.7536468506, zmax:49.6716804504, xmin: -50.0168418884, ymin: -38.7505760193, zmin: -49.451374054 x_edge: 1.0, y_edge: 0.775042266846, z_edge: 0.991230545044, edge: 1.0 center: [-0.01684189 0.00153542 0.1101532 ], staet: [-50.01684189 -49.99846458 -49.8898468 ] The mesh 0 has vertices (208353, 3) The mesh 0 process successfully in 173.323185921s

when set size=(100,100,100), pyflann parts costs 173s, it's too slow... So , what's the problem?

if set size=(50,50,50) The mesh 0 process successfully in 11.9634318352s

How can I get the result within 10s?