Nils Dagsson Moskopp <[email protected]> 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:[email protected]", "notmuch count tag:fromlinus" seems to be about 5-10x faster than "notmuch count from:[email protected]". 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.
>From d3fbbe7ac0a1fb5b5691674226a3a3d000e15a1c Mon Sep 17 00:00:00 2001 From: David Bremner <[email protected]> Date: Sat, 12 Apr 2014 11:50:22 -0300 Subject: [PATCH] WIP: new performance test for notmuch count Probably not suitable for production because of sudo --- performance-test/T03-count.sh | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100755 performance-test/T03-count.sh diff --git a/performance-test/T03-count.sh b/performance-test/T03-count.sh new file mode 100755 index 0000000..e74437e --- /dev/null +++ b/performance-test/T03-count.sh @@ -0,0 +1,23 @@ +#!/bin/bash + +test_description='counting' + +. ./perf-test-lib.sh + +time_start + +for i in $(seq 1 10); do + echo 3 | sudo tee /proc/sys/vm/drop_caches + notmuch --version > /dev/null + time_run "from:[email protected] " \ + "notmuch count from:[email protected]" + + echo 3 | sudo tee /proc/sys/vm/drop_caches + notmuch --version > /dev/null + + time_run "from:linux-foundation.org " \ + "notmuch count from:linux-foundation.org" +done + + +time_done -- 1.9.1
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