Should I NOT include jquery on pages that do not use it?
<p>I understand that after a browser loads jquery, generally it is added to the browsers cache.</p>

<p>My site has hundreds of pages and I have a header file that is included on these pages and only some of these pages use jquery code so I am wondering will a page load faster or have better performance to the end user if I do not include jquery on pages that do not use it, or since it is cached, does it not affect performance at all?</p>
