Cached D2 diagram rendering #166
Description
It can be quite slow, especially in watch mode:
success: successfully compiled - to - in 368.286875ms
success: successfully compiled - to - in 387.339416ms
success: successfully compiled - to - in 445.833791ms
success: successfully compiled - to - in 561.883084ms
success: successfully compiled - to - in 721.253334ms
success: successfully compiled - to - in 51.769209ms
success: successfully compiled - to - in 352.959292ms