file type (should be 0x4d42): 4d42
file size: 432000054
offset to image data: 54
header size: 40
width: 12000
height: 12000
planes: 1
bits: 24
load time:   0.3199
1 threads, invert time:   1.8463
2 threads, invert time:   0.9275
save time:   0.0002