Ivan Kozlovic 8d9c57ad44 [IMPROVED] Fan-out performance ...

There was an observed degradation (around 5%) for large fan out in
v2.9.0 compared to earlier release. This is because we added
accounting of the in/out messages for the account, which result
in 4 atomic operations, 2 for in and 2 for out, however, it means
that for a fan-out of say 100 matching subscriptions, it is now
2 + 2 * 100 = 202.

This PR rework how the stats accounting is done which removes
the regression and even boost a bit the numbers since we are
doing the server stats update as an aggregate too.

There are still degradation for queues and no-sub at all that
need to be looked at.

Signed-off-by: Ivan Kozlovic <ivan@synadia.com>

2022-09-27 19:43:32 -06:00

94 KiB

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