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add an index for modified to speed up sync.summary()

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testing indicates this can produce a 2x performance improvement on lastSync=0,
and much more for partial syncs
This commit is contained in:
Damien Elmes 2010-12-08 15:59:16 +09:00
parent fe97616ecd
commit 3491a5e378
1 changed files with 12 additions and 4 deletions
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16
anki/deck.py
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@ -69,7 +69,7 @@ SEARCH_FIELD = 6
SEARCH_FIELD_EXISTS = 7 SEARCH_FIELD_EXISTS = 7
SEARCH_QA = 8 SEARCH_QA = 8
SEARCH_PHRASE_WB = 9 SEARCH_PHRASE_WB = 9
DECK_VERSION = 56 DECK_VERSION = 57
deckVarsTable = Table( deckVarsTable = Table(
'deckVars', metadata, 'deckVars', metadata,
@ -3750,6 +3750,13 @@ create index if not exists ix_cards_typeCombined on cards
deck.s.statement(""" deck.s.statement("""
create index if not exists ix_cards_relativeDelay on cards create index if not exists ix_cards_relativeDelay on cards
(relativeDelay)""") (relativeDelay)""")
# index on modified, to speed up sync summaries
deck.s.statement("""
create index if not exists ix_cards_modified on cards
(modified)""")
deck.s.statement("""
create index if not exists ix_facts_modified on facts
(modified)""")
# priority - temporary index to make compat code faster. this can be # priority - temporary index to make compat code faster. this can be
# removed when all clients are on 1.2, as can the ones below # removed when all clients are on 1.2, as can the ones below
deck.s.statement(""" deck.s.statement("""
@ -4300,10 +4307,11 @@ update fieldModels set quizFontFamily = 'Arial' where not quizFontFamily
or quizFontFamily is null""") or quizFontFamily is null""")
deck.version = 55 deck.version = 55
deck.s.commit() deck.s.commit()
if deck.version < 56: if deck.version < 57:
# add an index for priority # add an index for priority & modified
DeckStorage._addIndices(deck) DeckStorage._addIndices(deck)
deck.version = 56 deck.s.statement("analyze")
deck.version = 57
deck.s.commit() deck.s.commit()
# executing a pragma here is very slow on large decks, so we store # executing a pragma here is very slow on large decks, so we store
# our own record # our own record