[jira] [Resolved] (JAMES-2098) Improve SetInMailboxes speed

["Antoine Duprat (JIRA)" <se...@james.apache.org>]

     [ https://issues.apache.org/jira/browse/JAMES-2098?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antoine Duprat resolved JAMES-2098.
-----------------------------------
    Resolution: Fixed

merged

> 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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