I have the following snippet:

```
from aicspylibczi import CziFile
from pathlib import Path

pth = Path('/Volumes/USB/20x_HE.czi')
czi = CziFile(pth)

image, shp = czi.read_image(C=0, M=0)   # very slow

```

The parameters C und M are there to slice the big array in to little numpy pieces.

The File is 3,4GB big and it is taking to long(with 8GB RAM Macbook) so I abort it always.

I think thats not okay because I want to have the first slice of the array, not the whole matrix.