Why is innerHTML = “” slow in Firefox

Question

I am testing the speed of different methods to dynamically add html elements to the DOM. I\'ve build a tester here (code is working version, so pretty sloppy). The results are (

Answer 1

innerHTML is not a part of the W3C DOM specification.

It should never be used to write parts of a table—W3C DOM methods should be used for that—though it can be used to write an entire table or the contents of a cell.

As there is no public specification for this property, implementations differ widely. For example, when text is entered into a text input, IE will change the value attribute of the input's innerHTML property but Gecko browsers do not.

For those wishing to adhere to standards, here is one set of JavaScript functions offering to serialize or parse XML so as to set element contents defined as string(s) via the DOM or getting element contents obtained from the DOM as a string.

Source - Mozilla Dev