Tellier Benoit created JAMES-2098:
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Summary: Improve SetInMailboxes speed
Key: JAMES-2098
URL: https://issues.apache.org/jira/browse/JAMES-2098
Project: James Server
Issue Type: Improvement
Reporter: Tellier Benoit
I was surprised to realise how SetInMailboxes operation is slow. See the
attached screenshots for rationals. It was generated while sorting 2 weeks of
email. Thus, I had an optimisation round on my free time. I found:
- That we can avoid a read in StoreMessageIdManager by avoiding calling delete
(which comes at the cost of extra reads).
- We can avoid updating flags when none specified
The last point implies:
- Avoiding extra reads before updating flags
- Avoiding noop updates of search engine
- This noop updates is, in fact, a replace with current flags, which can
compete with parallel flags updates. Thus, this optimisation also improve
concurrent behaviours, by uncoupling SetFlags and SetInMailboxes
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