+1

In particular, since this is supposed to be a beginner kata.
So far, I haven't solved this kata, as the instructions need much more clarification.

What is the table name? Which columns are expected to be returned, or just one row?

Your comment brightened up my day!

This is simple implementation of Brainf*ck esoteric language so there is something a beginner could learn from it but absolutely do not consider that a production quality code 👌.

Absolutely insane solution, but as a Dart beginner I learned so many techniques from this simple "Hello World" program.

The solution to that is to run the test a statistically relevant number of times, like 1,000 or even 10,000 times.
The more efficient algorithm will finish 1,000 cycles faster than a less optimised one.

Refer to the official docs to learn more about this:
https://docs.python.org/3/library/timeit.html