@Maurits Yeah, having the /tmp directory as a ramdisk is rather a good idea for computers with very slow I/O. I actually experimented with making various subdirs of /var a ramdisk at one point (this wasn't a server so most things in /var didn't really need to stick around after a reboot) but gave up on the idea because of the number of various caches that would have to be backed up to avoid yet more I/O, and the irritation of log files being deleted. I don't think all Linux distros have /tmp set up as a ramdisk, but some either do or recommend doing so. But with I/O the speed it is nowadays, it's not really necessary for most cases.
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