I'm surprised that thid was got approved because mine seems to be duplicated.

When I was thinking about writing this kata I couldn't find any similar kata.

It should be infinite, in other words - endless, limitless, illimitable, unending, unceasing, perpetual.
So never ending but within a time limit (12 seconds).

This is a new kind of task - you need to optimize server side code ^_^

The description doesn't say that there may be recursive callbacks.
It's better if you note it there.

Becase I wrote a piece of code that calls the fourth argument in the beginning, therefore causing "Maximum call stack size exceeded" error.

The same solution as Xom9lk's is and unrelated as well but I still like it ^_^

I'm not arguing with your solutions, it tricked me in the first glance, so notice for everyone else:

Such function only applies caching to a current call.
It means if the function takes 7 seconds to complete, calling it 3 times, in total, will take 21 seconds.

Reasonable. Added.

Mmm... Yeah, you're right. Fixed the headings, description and the conflict.

The initial object should be affected too, as it's said in the description

Do you still need it?

Even though I fixed it

I see

Because this is a duplicate :)

In the game there is a power usage mechanic. What if this mechanic will be added to kata?
In other words, make it be like assembler interpreter but with some mechanics from the game.

Ok, sorry for arguing with you, js was refactored using chai