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<b>Want to improve this question?</b> Update the question so it focuses on one problem only by <a href="/posts/25272390/edit">editing this post</a>.
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<p class="mb0 mt6">Closed <span title="2014-08-12 22:14:54Z" class="relativetime">5 years ago</span>.</p>
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I have a question about google hosted libraries.
https://developers.google.com/speed/libraries/devguide#jquery
Does my web application really run faster if i use there libraries like jquery and jquery ui instead of the one that I saved in the libraries in my ftp root folder in my web host?
I'm questioning these because I'm running my web application in localhost but I'm planning to rent a webhost to make it online.
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Google hosted libraries are basically a content delivery network (CDN). You can read up more about CDNs here: http://en.wikipedia.org/wiki/Content_delivery_network
Content hosted on CDNs is replicated across data-centers around the world so that it can be accessed quickly wherever your end-user is located.
The content located on your web-domain might be accessible to you or a specific sub-set of your end-users fairly quickly but as the geographic distance between your webhost and the end-user grows, the page load times might become more noticeable.
CDNs also provide some additional benefits like: preventing DDOS attacks, isolating your host from security holes found in third-party libraries which otherwise may have rendered your host vulnerable if not patched in time, etc.