Thanks for the feedback. Please see below:

• Not sure if you mean that the value should be higher than 1000 for it to have a genuine impact on performance. I do however want to discourage innefficient solutions.
• I have dropped the square brackets from the test names and made some other minor adjustments.
• To avoid confusion I have changed the sample test to also use strings. With that test I'm just trying to re-enforce that the element type is irrelevant.