jquery - External Javascript files extremely slow in IE 8,9,10,11 -

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my site calls js files google & microsoft's libraries. example:

<script src="https://ajax.microsoft.com/ajax/4.0/4/microsoftajax.js" type="text/javascript"></script>   <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js" type="text/javascript"></script>

my site loads fine on chrome & firefox, when open in ie (8,9,10,11), takes ages load. looking @ http watch, waterfall shows every external js file taking 20+ seconds load. total site load time upwards of 60 seconds.

if open js files directly in ie, loads instantaneously:

https://ajax.microsoft.com/ajax/4.0/4/microsoftajax.js https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js

it's slow loading when called through website. website on cdn , loads correctly when spoofing directly our origin server. external js files slow down when page loaded through cdn.

additionally, on companies/networks/vpns, cdn site loads fine on ie. on other companies/networks/vpns, see slowness.

any ideas causing this?


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