Element + ID vs only ID in jquery?

Question

div#some_id will scan through all the divs throughout the DOM.

#some_id will pick up the ID directly from the DOM.

So which is fast

Answer 1

See Optimize Selectors:

Beginning your selector with an ID is always best.

and

ID-only selections are handled using document.getElementById(), which is extremely fast because it is native to the browser.

So the answer is: $('#some_id') should be faster.