The Lucee documentation states the following for structKeyArray():
For unsorted structs, Adobe returns a text sorted Array of keys, for performance reasons, Lucee simply returns the raw sort order
This statement is NOT correct.
Using the built-in cftry portion of the Lucee Docs
Shows that the returned array is indeed, sorted.
(Lucee 4.5, 5.4 and 6 - all return a sorted array.)
Either the documentation is wrong - or Lucee does not correctly implement its own spec.