oddgen "Run test" generator is slow

[PhilippSalvisberg]

The node tree is loaded eagerly, this means all nodes are loaded in one go. Oddgen is not aware of the load strategy and therefore asks the generator for every selected parent node for its child nodes recursively. This makes the generator sluggish.

A simple solution is to cache the nodes on first read. The cache will be automatically refreshed when refresh is pressed in oddgen's Generator window (old generators are discarded and new ones are created).