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optimize updatePriorities(), get a 2-3x speedup

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This commit is contained in:
Damien Elmes 2009-05-09 05:58:42 +09:00
parent 6893d01458
commit 57b659ca36
1 changed files with 15 additions and 6 deletions
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21
anki/deck.py
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@ -757,7 +757,8 @@ and priority in (1,2,3,4) and type in (0, 1)""", time=time)
new = self.updateTagPriorities() new = self.updateTagPriorities()
if not partial: if not partial:
new = self.s.all("select id, priority as pri from tags") new = self.s.all("select id, priority as pri from tags")
cids = self.s.column0("select cardId from cardTags where tagId in %s" % cids = self.s.column0(
"select distinct cardId from cardTags where tagId in %s" %
ids2str([x['id'] for x in new])) ids2str([x['id'] for x in new]))
self.updatePriorities(cids, dirty=dirty) self.updatePriorities(cids, dirty=dirty)
@ -793,6 +794,10 @@ and priority in (1,2,3,4) and type in (0, 1)""", time=time)
self.s.statement( self.s.statement(
"update tags set priority = 0 where id in %s" % "update tags set priority = 0 where id in %s" %
ids2str(ids.values())) ids2str(ids.values()))
if len(cardIds) > 1000:
limit = ""
else:
limit = "and cardTags.cardId in %s" % ids2str(cardIds)
cards = self.s.all(""" cards = self.s.all("""
select cardTags.cardId, select cardTags.cardId,
case case
@ -802,15 +807,19 @@ when min(tags.priority) = 1 then 1
else 2 end else 2 end
from cardTags, tags from cardTags, tags
where cardTags.tagId = tags.id where cardTags.tagId = tags.id
and cardTags.cardId in %s %s
group by cardTags.cardId""" % ids2str(cardIds)) group by cardTags.cardId""" % limit)
if dirty: if dirty:
extra = ", modified = :m " extra = ", modified = :m "
else: else:
extra = "" extra = ""
self.s.statements( for pri in range(5):
"update cards set priority = :pri %s where id = :id" % extra, cs = [c[0] for c in cards if c[1] == pri]
[{'id': c[0], 'pri': c[1], 'm': time.time()} for c in cards]) if cs:
self.s.statement((
"update cards set priority = :pri %s where id in %s "
"and priority != :pri") % (
extra, ids2str(cs)), pri=pri, m=time.time())
cnt = self.s.execute( cnt = self.s.execute(
"update cards set isDue = 0 where type in (0,1,2) and " "update cards set isDue = 0 where type in (0,1,2) and "
"priority = 0 and isDue = 1").rowcount "priority = 0 and isDue = 1").rowcount