Painful load times

[cluelessPHP]

I made an auto complete input box of every town,city,village in the UK...yes every single one the load times are painful to say the least is there a way to reduce that?
Yes it's in the fiddle I really don't think it would fit in here.
https://jsfiddle.net/tft0fwbd/

I threw it out here as well

http://codereview.stackexchange.com/questions/148568/pain-loading-times-jquery-auto-complete

[dalecosp]

First thing to do, do you have a minimum character requirement? Generally I set it so they have to type at least 3 chars before the autocomplete even starts.

[Weedpacket]

Would constraining searches to prefixes help?

[cluelessPHP]

$( "#location" ).autocomplete({
      source: availableTags,
      delay: 0,
      minLength: 2,
});

Someone suggested this seems to work