Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!decvax!harpo!seismo!hao!hplabs!sri-unix!mike.rice@rand-relay From: mike.rice@rand-relay@sri-unix.UUCP Newsgroups: net.unix-wizards Subject: Re: Shared system routines Message-ID: <3462@sri-arpa.UUCP> Date: Mon, 25-Jul-83 18:50:24 EDT Article-I.D.: sri-arpa.3462 Posted: Mon Jul 25 18:50:24 1983 Date-Received: Thu, 28-Jul-83 14:41:27 EDT Lines: 11 From: Mike.CaplingerAnybody ever heard of shareable images under VMS? There's no additional overhead once a process's address space is mapped in because tha shared routines are just magically mapped in virtual memorywise. I think there were once plans to put such things in 4.2 BSD, but they seem to have been abandoned. They are nice in VMS, and can save lots of disk space. Also, if you change something you just reinstall the sharable library - nothing need be relinked (if you're clever and use a vector table, anyway.) I don't like too many things about VMS, but this seems to be a major win.