improve inefficient jQuery selector

Question

In IntelliJ, if I use a jQuery selector such as:

$('#roleField option').each(function() {
    // impl omitted
});

The selector is highlighted with a suggestion that I should

split descendant selectors which are prefaced with ID selector

what exactly is IntelliJ suggesting that I should replace the selector above with?

Answer 1

From the jquery documentation this method will not go through the Sizzle sector engine:

$('#roleField option').each(function() {
    // No Sizzle
}); 

Where this one will:

$('#roleField').find('option')  // Sizzle!

Look at the ID base selectors section here. Hence the second method will be faster than the first.