Re: is speed a concern?

True. I'd forgotten that. I used to have speed problems with VM, but then I slightly modified my practices to keep folders below a reasonable size (10-20MB), and the only time I notice is on the rare occasions when I try to load the last 20 years' mail in one file (which I don't do, since it doesn't work!). I notice that if I do that (130MB folder, 30k messages), 21.4 and 21.5 have very different behaviour (with the same vm code). 21.4 loads the file quickly, and in some not too bad time enters vm-mode. By then, it's using 180MB of main memory. 21.5 is slower to load, and is then a good deal slower to go into vm-mode, after which time it's using 450MB. But the most striking difference is generating the summary: 21.4 basically can't do it - on the basis of how it starts, it would take weeks to finish. 21.5, on the other hand, generates the summary in reasonable time. So it looks as if the difference is some quadratic vs linear difference of the kind you mention. Would you have an idea what the key difference between 21.4 and 21.5 would be, that removes the terminal slowness of summary building? -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://calypso.tux.org/cgi-bin/mailman/listinfo/xemacs-beta