GHPython Some Bottlenecks (Bugs?)

This is a mirror of this thread: http://www.grasshopper3d.com/forum/topics/ghpython-some-bottlenecks-bugs

Hi Giulio and Steve,

I've recently noticed a couple of bottleneck with the GHPython component which can quite severely impede on performance. Thought I would bring them up here so as to hopefully help others facing similar issues.

1) Letting Grasshopper perform the "implied" loop can be substantially slower than making the loop yourself inside the Python script. This is understandable, however the strangest thing is that it is MUCH slower if the definition has been saved than when it has not (by about a factor of 10)!

2) Setting type hints seems to be slower than inputting data with "No Type Hint". This depends a bit on which type is being input, but this seems to be fairly consistent. In the attached example by about a factor of 3. I suppose this is understandable, but not exactly ideal.

3) Outputtings lists with many items will often take longer than the actual computation performed by the script. I suppose this is more of a Grasshopper thing. My workaround has been to wrap the list in a Python list and pass this along as an item, which will be ALOT faster with large lists (this was crucial to both the Tower and ShapeOP where we pass around large amounts of constraints).

I'm not sure if these bottlenecks are just examples of me being dumb, if so I hope you can enlighten me to the errors of my ways :)

Attached some screenshots of an unsaved/saved definition which demonstrates the described issues. Also please find the gh definition attached.

Best,

Anders

mcneel / ghpython

GHPython Some Bottlenecks (Bugs?) #71