DBMail just received a huge performance boost: version 2.3.3 released today features a shiny new networking/database core.
The new shared database connection pool drastically reduces the number of database connections (and backend network sockets) required to serve large amounts of concurrent frontend users.
The frontend itself, meanwhile, has been rewritten as an asynchronous event-driven process.
Combined, these changes provide solid fundamentals for a future 2.4.x release series focused on performance and scalability.
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