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User Cursor.__iter__ instead of fetchall

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This prevents unnecessary construction of lists
This commit is contained in:
Erik Johnston 2017-03-23 17:53:49 +00:00
parent 59358cd3e7
commit 00957d1aa4
16 changed files with 41 additions and 42 deletions
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10
synapse/storage/deviceinbox.py
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@ -178,7 +178,7 @@ class DeviceInboxStore(BackgroundUpdateStore):
)
txn.execute(sql, (user_id,))
message_json = ujson.dumps(messages_by_device["*"])
for row in txn.fetchall():
for row in txn:
# Add the message for all devices for this user on this
# server.
device = row[0]
@ -195,7 +195,7 @@ class DeviceInboxStore(BackgroundUpdateStore):
# TODO: Maybe this needs to be done in batches if there are
# too many local devices for a given user.
txn.execute(sql, [user_id] + devices)
for row in txn.fetchall():
for row in txn:
# Only insert into the local inbox if the device exists on
# this server
device = row[0]
@ -251,7 +251,7 @@ class DeviceInboxStore(BackgroundUpdateStore):
user_id, device_id, last_stream_id, current_stream_id, limit
))
messages = []
for row in txn.fetchall():
for row in txn:
stream_pos = row[0]
messages.append(ujson.loads(row[1]))
if len(messages) < limit:
@ -340,7 +340,7 @@ class DeviceInboxStore(BackgroundUpdateStore):
" ORDER BY stream_id ASC"
)
txn.execute(sql, (last_pos, upper_pos))
rows.extend(txn.fetchall())
rows.extend(txn)
return rows
@ -384,7 +384,7 @@ class DeviceInboxStore(BackgroundUpdateStore):
destination, last_stream_id, current_stream_id, limit
))
messages = []
for row in txn.fetchall():
for row in txn:
stream_pos = row[0]
messages.append(ujson.loads(row[1]))
if len(messages) < limit: