Connor Lane

Ya I did a quick profiling, with `mmap=True`, it's spending almost all of the time [here](https://github.com/nipy/nibabel/blob/e9ed337c0e549acc9b9e1b2eee809cfb154b9450/nibabel/arrayproxy.py#L423), doing casting it seems.  With `mmap=False`, the casting takes less time and most...

Ya I agree, I feel like there's not much worth doing at this point. Especially since in this case `mmap=False` is fine. Just wanted to make a note since it...

I also had this issue. I'm using docker and was able to resolve by mapping a complete fsaverage directory into the container. ```sh docker run --rm \ -v "${datadir}:/data:ro" \...