If you look at the debug information in your footer:
Quote
Page Time: 0.028s Queries: 9 (0.007s) Memory: 1.6056 MB (Peak: 1.7083 MB) Zlib disabled. Server Time: 2017-03-26 07:27:15 UTC

You can see that the page was generated pretty quickly, it's the external assets (javascript, images, etc) that're slowing down the users browser after the page is built.

If you're looking to trim any bloat, Pingdom has a test for showing all assets that your page generates.

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