Perspective XYChart is slow [running named query]

Ignition 8.1.0-rc3: Using 3 XYCharts in one view (Flex container), each running a Named Query on a local SQLExpress db (no polling) using 5 parameters passed (using custom properties) from the parent container into which my view is embedded.

All 3 SQL queries run within a second in SSMS (Management Studio) and return 300, 17 and 3 rows respectively but when I launch the Perspective session or even within the Designer, the charts take up to 16 seconds to show up. The Named queries return a json and there is no Transform going on.

Ignition on Windows Server 2016 Datacenter with SQLExpress as the DB in the same VM (Intel Xenon, 2.2 GHz (2 processors) with 12GB RAM).