file type (should be 0x4d42): 4d42
file size: 343450
offset to image data: 54
header size: 40
width: 390
height: 293
planes: 1
bits: 24
load time:   0.0016
1 threads, invert time:   0.0019
2 threads, invert time:   0.0022
3 threads, invert time:   0.0009
4 threads, invert time:   0.0009
5 threads, invert time:   0.0008
6 threads, invert time:   0.0012
7 threads, invert time:   0.0009
8 threads, invert time:   0.0010
9 threads, invert time:   0.0020
10 threads, invert time:   0.0021
11 threads, invert time:   0.0021
12 threads, invert time:   0.0022
13 threads, invert time:   0.0023
14 threads, invert time:   0.0022
15 threads, invert time:   0.0021
16 threads, invert time:   0.0027
17 threads, invert time:   0.0024
18 threads, invert time:   0.0027
19 threads, invert time:   0.0022
20 threads, invert time:   0.0026
save time:   0.0001