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Small Python optimizations.

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This commit is contained in:
Bertrand Bordage 2014-10-21 13:56:58 +02:00
parent 11070fe3c6
commit b872e22cdc
1 changed files with 7 additions and 6 deletions
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13
cachalot/utils.py
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@ -1,6 +1,7 @@
# coding: utf-8
from __future__ import unicode_literals
from collections import defaultdict
from hashlib import md5
@ -27,17 +28,17 @@ def _get_table_cache_key(db_alias, table):
def _get_tables_cache_keys(compiler):
return [_get_table_cache_key(compiler.using, t)
using = compiler.using
return [_get_table_cache_key(using, t)
for t in _get_tables(compiler.query)]
def _update_tables_queries(cache, compiler, cache_key):
tables_cache_keys = _get_tables_cache_keys(compiler)
tables_queries = cache.get_many(tables_cache_keys)
tables_queries = defaultdict(list)
tables_queries.update(cache.get_many(tables_cache_keys))
for k in tables_cache_keys:
queries = tables_queries.get(k, [])
queries.append(cache_key)
tables_queries[k] = queries
tables_queries[k].append(cache_key)
cache.set_many(tables_queries)
@ -45,7 +46,7 @@ def _invalidate_tables_cache_keys(cache, tables_cache_keys):
if hasattr(cache, 'to_be_invalidated'):
cache.to_be_invalidated.update(tables_cache_keys)
tables_queries = cache.get_many(tables_cache_keys)
queries = [q for k in tables_cache_keys for q in tables_queries.get(k, [])]
queries = [q for q_list in tables_queries.values() for q in q_list]
cache.delete_many(queries + tables_cache_keys)