Math is the devil's work, I tell ya. /s

Probably a definition created for learning purposes, but true, it does not exist anywhere on the internet being used with an array besides here.

Code so strong it can't be broken.

What does the description not tell you about how to solve the kata?

I'm one of the 1,800 people that solved this Kata. But that doesn't mean the instructions couldn't use significant improvement.

The description defines clearly what is expected. Notice that more than 1800 persons solved this kata and nobody complained about that before.

I can't find any definition on the internet for the Stanton Measure of an array.
This doesn't appear to be a real thing. For that reason the description needs a longer and more complete explanation of what is required.
This is a time waster.

You made a deal with the devil to make this one work.

Crazy! But cool.

All code should be written like this.
I think we can all agree on that.

Most 4 kyu Katas I did were easier than even figuring out how to get started on solving this one...

100%

You forgot, I didn't even know! I'm learning a lot here

Sorry that you feel frustrated about this kata.
The timeout happens because your algorithm might be of complexity O(n^3) or above.
If you can reduce the complexity, the timeouts should go away.
You reduce the complexity, by eliminating/refactoring the number of
nested for-loops that might be in your code.

Tweak your logic that already works in the following manner to gain performance:
Instead of initiating the search for a substring with minimum size, start
with a substring of maximum size and work your way down.

Almost 2000+ (out of5000) have solved it, so can you. Go for it!