Nils Dagsson Moskopp <nils at dieweltistgarnichtso.net> writes: > > mjw1009 can reproduce if the from-query contains an "@" and thinks the > problem may be "something deeper down in notmuch (actually probably in > xapian)".
My own experiments contradict that (see attached patch for a test to run). The exact address is about twice as fast to count on both of my machines, which matches the amount of I/O. FWIW, my SSD based laptop is about 10x faster (compared to a similarly specced desktop with HD) for both of them, which kindof reinforces how I/O bound this is. Replacing 'count' with 'search' gives pretty similar relative behaviour, although much slower since it seems to do about 10x I/O. Finally after an initial "notmuch tag +fromlinus from:torvalds at linux-foundation.org", "notmuch count tag:fromlinus" seems to be about 5-10x faster than "notmuch count from:torvalds at linux-foundation.org". So that might be a workaround for some people. To sum up, I think the underlying question is whether the amount of I/O that count does can be reduced when using non-boolean query terms. -------------- next part -------------- A non-text attachment was scrubbed... Name: 0001-WIP-new-performance-test-for-notmuch-count.patch Type: text/x-diff Size: 1119 bytes Desc: not available URL: <http://notmuchmail.org/pipermail/notmuch/attachments/20140412/c9883ac1/attachment.patch>