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Freeze allocated objects on startup. (#6953)

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This may make gc go a bit faster as the gc will know things like
caches/data stores etc. are frozen without having to check.
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Erik Johnston 2020-02-19 15:09:00 +00:00 committed by GitHub
parent 2b37eabca1
commit fc87d2ffb3
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changelog.d/6953.misc Normal file
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@ -0,0 +1 @@
Reduce time spent doing GC by freezing objects on startup.

9
synapse/app/_base.py
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@ -279,6 +279,15 @@ def start(hs, listeners=None):
setup_sentry(hs)
setup_sdnotify(hs)
# We now freeze all allocated objects in the hopes that (almost)
# everything currently allocated are things that will be used for the
# rest of time. Doing so means less work each GC (hopefully).
#
# This only works on Python 3.7
if sys.version_info >= (3, 7):
gc.collect()
gc.freeze()
except Exception:
traceback.print_exc(file=sys.stderr)
reactor = hs.get_reactor()