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Merge pull request #1615 from matrix-org/erikj/limit_prev_events

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Limit the number of prev_events of new events
This commit is contained in:
Erik Johnston 2016-11-08 12:06:15 +00:00 committed by GitHub
commit 17e0a58020
1 changed files with 15 additions and 0 deletions
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15
synapse/handlers/message.py
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@ -34,6 +34,7 @@ from ._base import BaseHandler
from canonicaljson import encode_canonical_json
import logging
import random
logger = logging.getLogger(__name__)
@ -415,6 +416,20 @@ class MessageHandler(BaseHandler):
builder.room_id,
)
# We want to limit the max number of prev events we point to in our
# new event
if len(latest_ret) > 10:
# Sort by reverse depth, so we point to the most recent.
latest_ret.sort(key=lambda a: -a[2])
new_latest_ret = latest_ret[:5]
# We also randomly point to some of the older events, to make
# sure that we don't completely ignore the older events.
if latest_ret[5:]:
sample_size = min(5, len(latest_ret[5:]))
new_latest_ret.extend(random.sample(latest_ret[5:], sample_size))
latest_ret = new_latest_ret
if latest_ret:
depth = max([d for _, _, d in latest_ret]) + 1
else: