> Some container disk I/O is much slower than expected. See docker/for-mac#5389. Disk flushes are particularly slow due to the need to guarantee data is written

> Some container disk I/O is much slower than expected. See docker/for-mac#5389. Disk flushes are particularly slow due to the need to guarantee data is written to stable storage on the host. This is an artifact of the new virtualization.framework in Big Sur. If I don’t care about persistence of my containers (e.g. I’m just running ephemeral tests), is there a way to disable Docker for Mac / Virtualization.framework’s cache-flushing behaviour entirely? I.e. to get the same behaviour as mounting Linux ext4 with -o nobarrier,data=writeback? Does Virtualization.framework maybe have first-class support for swap volumes — i.e. inherently ephemeral volumes, that don’t need to be flushed to the host?