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a2d78fba20
Buffer redisplay requires traversing the buffer's invisibility spec for every part of the display that has an 'invisible text or overlay property. Previously, the search buffer's invisibility spec list contained roughly one entry for each search result. As a result, redisplay took O(NM) time where N is the number of visible lines and M is the total number of results. On a slow computer, this is enough to make even buffer motion noticeably slow. Worse, during a search operation, redisplay is triggered for each search result (even if there are no visible buffer changes), so search was quadratic (O(NM^2)) in the number of search results. This change switches to using a single element buffer invisibility spec. To un-hide authors, instead of removing an entry from the invisibility spec, it simply removes the invisibility overlay from those authors. I tested using a query with 6633 results on a 9 year old machine. Before this patch, Emacs took 70 seconds to fill the search buffer; toward the end of the search, Emacs consumed 10-20x as much CPU as notmuch; and moving point in the buffer took about a second. With this patch, the same query takes 40 seconds, Emacs consumes ~3x the CPU of notmuch by the end, and there's no noticeable lag to moving point. (There's still some source of non-linearity, because Emacs and notmuch consume roughly the same amount of CPU early in the search.) |
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| coolj.el | ||
| Makefile | ||
| Makefile.local | ||
| notmuch-address.el | ||
| notmuch-crypto.el | ||
| notmuch-hello.el | ||
| notmuch-lib.el | ||
| notmuch-logo.png | ||
| notmuch-maildir-fcc.el | ||
| notmuch-message.el | ||
| notmuch-mua.el | ||
| notmuch-query.el | ||
| notmuch-show.el | ||
| notmuch-wash.el | ||
| notmuch.el | ||
