LXD performance observation

You might want to consider enabling tmpfs...

$ lxc launch ubuntu:20.04 test-container
Creating test-container
Starting test-container
$ lxc exec test-container df /tmp
Filesystem                        1K-blocks   Used Available Use% Mounted on
default/containers/test-container  47227904 533248  46694656   2% /
$

I get why it's not enabled by default, but it's still surprising until you think about it.