Purpose

Getting the __doc__ docstrings in the IronPython2 can be very slow (15-100ms) for each call. Every time you press . on a large namespace or type, Dynamo (and possibly its host) freezes. Whenever you use the Autodesk.Revit.DB. namespace for example, Revit freezes for multiple seconds, making editing iron python 2 scripts a horrible experience.

Luckily the experience is much better in IronPython3 and getting the docstrings is much faster.

Unfortunately, it CPython getting the docstrings has not been implemented yet.

This PR also implements lazy loading of the in the overarching class and delays the execution until the description is actually displayed and needed.

User Experience

This is what a user experiences currently (felt like 10 seconds to me):

And here's the now instantaneous experience with the proposed changes:

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated
• This PR contains no files larger than 50 MB

Release Notes

(FILL ME IN) Brief description of the fix / enhancement. Use N/A to indicate that the changes in this pull request do not apply to Release Notes. Mandatory section

Reviewers

(FILL ME IN) Reviewer 1 (If possible, assign the Reviewer for the PR)

(FILL ME IN, optional) Any additional notes to reviewers or testers.

FYIs

@bendikberg, @mjkkirschner