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Improve performance of get_categoris by using ProxyMetadata objects

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Kovid Goyal 2014-11-01 22:35:59 +05:30
parent cc3573480e
commit c18b9593cb
1 changed files with 9 additions and 2 deletions
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9
src/calibre/db/categories.py
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@ -140,7 +140,14 @@ def get_categories(dbcache, sort='name', book_ids=None, icon_map=None):
categories = {} categories = {}
book_ids = frozenset(book_ids) if book_ids else book_ids book_ids = frozenset(book_ids) if book_ids else book_ids
get_metadata = partial(dbcache._get_metadata, get_user_categories=False) pm_cache = {}
def get_metadata(book_id):
ans = pm_cache.get(book_id)
if ans is None:
ans = pm_cache[book_id] = dbcache._get_proxy_metadata(book_id)
return ans
bids = None bids = None
for category, is_multiple, is_composite in find_categories(fm): for category, is_multiple, is_composite in find_categories(fm):