save length of the array in the variable vs get it the loop

This checks for medium sized duplicated input to contain unique entries

Let's compare the speed of 4 different ways to traverse the DOM.

ISO Datetime - add microseconds - replace vs slice

Is it faster to detect if a variable is an integer or is it faster to use typeof to verify the type?

Checks endsWith vs index

Testing creating a new Intl.DateTimeFormat each time vs. caching it using simple string as the key.

People tend to use array fil and then foreach, we know foreach is faster than a for loop, but is it also faster if you use array fill first?

Create array from Node.childNodes