OTB 8 appears to be slower than 7.3.0

At least on some operations. Notice the huge difference in user time:

# OTB 7.3.0
otbcli_ComputeImagesStatistics -il brightness.tif  83.91s user 2.12s system 899% cpu 9.568 total

# OTB 7.4.0
otbcli_ComputeImagesStatistics -il brightness.tif  89.18s user 1.92s system 936% cpu 9.732 total

# OTB 8.0.0
otbcli_ComputeImagesStatistics -il brightness.tif  116.50s user 2.18s system 996% cpu 11.913 total

# bonus: OTB 5.0.0
otbcli_ComputeImagesStatistics -il brightness.tif  101.95s user 0.68s system 726% cpu 14.127 total

Image is an uncompressed 10980x10980x25 Int16 TIFF.