ramdisk create <size in GiB> -> creates a RAM disk of size <size in GiB> . ramdisk destroy -> tearsdown the previously created RAM disk, cleans ...
RAMDisk: is an app for creating as well as backing up RAM disks, to allow you to save their contents as well as restore RAM disks when you restart your Mac.
Testing software on macOS that performs heavy writes, especially to a local database like Sqlite? Consider a blast-from-the-path and create a RAM disk.