*November 17th 2005*
*comparing old (PBRT) kd-tree builder to new code on X800XT PE*

Old builder (backtrack)

scene     ray/s        build-time (ms)
cbox      2688225      1.42
glassner  708040       36.08
bunny     378892       4291.00
robots    269649       5138.42
kitchen   291129       7908.24

New builder (backtrack) [minimumCellFractionalExtent=0.001 primitiveCost=splitCost=1]

scene     ray/s        build-time (ms)
cbox      3216885      6.38
glassner  1083857      315.20
bunny     407283       45896.28
robots    232574       26770.71
kitchen   327574       43004.59

New builder (backtrack) [minimumCellFractionalExtent=0.00001 primitiveCost=splitCost=1]

scene     ray/s        build-time (ms)
cbox      3234610      6.36
glassner  1094442      322.42
bunny     384388       53506.17
robots    418351       52187.61
kitchen   333034       63371.81

Old builder (restart)

scene     ray/s
cbox      2784513
glassner  715065
bunny     366040
robots    260233
kitchen   267686

New builder (restart) [minimumCellFractionalExtent=0.00001 primitiveCost=splitCost=1]

scene     ray/s
cbox      3414310
glassner  1032321
bunny     406141
robots    377262
kitchen   300549

*potentially less useful data follows*

New builder (restart) [minimumCellFractionalExtent=0.00001 primitiveCost=4 splitCost=1]

scene     ray/s
cbox      2946965
glassner  883915
bunny     326941
robots    334301
kitchen   282158

New builder (restart) [minimumCellFractionalExtent=0.00001 primitiveCost=1 splitCost=2]

scene     ray/s
cbox      3368119
glassner  1088006
bunny     431082
robots    381126
kitchen   309778

New builder (backtrack) [minimumCellFractionalExtent=0.00001 primitiveCost=1 splitCost=2]

scene     ray/s
cbox      3387039
glassner  1092910
bunny     429734
robots    411538
kitchen   323188