b4tman/sync_ics2gcal
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performance fix in compare

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zip()'ing sorted lists is like 10x faster
( 1.56 seconds instead of 15.05 in test_compare, part_len=5000 )
This commit is contained in:
Dmitry Belyaev 2018-04-11 12:36:37 +03:00
parent 8eb94089a7
commit 8ea8512c11
Signed by: b4tman
GPG Key ID: 014E87EC54B77673
1 changed files with 7 additions and 9 deletions
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16
gcal_sync/sync.py
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@ -39,20 +39,18 @@ class CalendarSync():
keys_to_update = keys_src & keys_dst
keys_to_delete = keys_dst - keys_src
def get_item(items, key_val):
for item in filter(lambda item: item[key] == key_val, items):
return item
def items_by_keys(items, key_name, keys):
return list(filter(lambda item: item[key_name] in keys, items))
items_to_insert = items_by_keys(items_src, key, keys_to_insert)
items_to_delete = items_by_keys(items_dst, key, keys_to_delete)
items_to_update = []
for key_val in keys_to_update:
items_to_update.append( (get_item(items_src, key_val), get_item(items_dst, key_val)) )
to_upd_src = items_by_keys(items_src, key, keys_to_update)
to_upd_dst = items_by_keys(items_dst, key, keys_to_update)
to_upd_src.sort(key=get_key)
to_upd_dst.sort(key=get_key)
items_to_update = list(zip(to_upd_src, to_upd_dst))
return items_to_insert, items_to_update, items_to_delete
def _filter_events_to_update(self):