[PATCH v2 9/9] cli: do not sort addresses on --output=count or --deduplicate=address

[Jani Nikula]

The order of the results with --output=count and --deduplicate=address
are unspecified as they're based on a hash table traversal. This being
the case, optimize the query by explicitly requesting unsorted
results. Clarify the documentation accordingly.
---
 doc/man1/notmuch-address.rst | 4 +++-
 notmuch-search.c             | 5 +++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/doc/man1/notmuch-address.rst b/doc/man1/notmuch-address.rst
index b85cc37213e5..cbdb851980a8 100644
--- a/doc/man1/notmuch-address.rst
+++ b/doc/man1/notmuch-address.rst
@@ -85,7 +85,9 @@ Supported options for **address** include
         By default, results will be displayed in reverse chronological
         order, (that is, the newest results will be displayed first).
 
-        This option is not supported with --output=count.
+        However, if either --output=count or --deduplicate=address is
+        specified, this option is ignored and the order of the results
+        is unspecified.
 
     ``--exclude=(true|false)``
         A message is called "excluded" if it matches at least one tag in
diff --git a/notmuch-search.c b/notmuch-search.c
index deb9e58a747c..b58496bf09d5 100644
--- a/notmuch-search.c
+++ b/notmuch-search.c
@@ -885,6 +885,11 @@ notmuch_address_command (notmuch_config_t *config, int argc, char *argv[])
 					    _talloc_free_for_g_hash,
 					    _list_free_for_g_hash);
 
+    /* The order is not guaranteed if a full pass is required, so go
+     * for fastest. */
+    if (ctx->output & OUTPUT_COUNT || ctx->dedup == DEDUP_ADDRESS)
+	notmuch_query_set_sort (ctx->query, NOTMUCH_SORT_UNSORTED);
+
     ret = do_search_messages (ctx);
 
     g_hash_table_unref (ctx->addresses);
-- 
2.1.4