A template icon is drawn through Batik once, not on every send
InlineImageTransport memoised a drawing only within one message, so every send that wore the compose template decoded and transcoded the same handful of social ...
Calendar reminder sends move off the shared scheduler thread
Spring's default single scheduler thread is shared by every @Scheduled method in this service — the 1-second campaign pulse, the drip engine's tick, and Reminde...
Index a message in one statement instead of a select-then-write
The search index row's key is assigned rather than generated, so handing a built entity to save() was a merge: Spring Data SELECTed the whole row — body text in...
Stop opening every folder, and stop refetching every message
Two round-trip problems on the /messages critical path, both invisible in the code that caused them. listFolders opened each folder read-only to read two integ...
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