scripts are causing slowness in loading

Hello,

I was going throw optimizing the website speed with my hosting .. and eventually i received the below .. which seems to me something related to the theme itself, so could you give me some help please …

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I have inspected the website at https://www.giftsbuzz.com and I could see that several scripts associated with the website are causing slowness in loading. Those are:

autoptimize_4f5c6698352a5d26957763010ee73170.js:2:542
Loading failed for the <script> with source “https://secure.assets.tumblr.com/share-button.js”.
%d9%87%d8%af%d8%a7%d9%8a%d8%a7-%d8%a7%d8%b7%d9%81%d8%a7%d9%84:1
Loading failed for the <script> with source “https://platform.stumbleupon.com/1/widgets.js”.
%d9%87%d8%af%d8%a7%d9%8a%d8%a7-%d8%a7%d8%b7%d9%81%d8%a7%d9%84:1
unreachable code after return statement[Learn More]
js:69:1216
Loading failed for the <script> with source “https://platform.twitter.com/widgets.js”.
%d9%87%d8%af%d8%a7%d9%8a%d8%a7-%d8%a7%d8%b7%d9%81%d8%a7%d9%84:1
unreachable code after return statement[Learn More]
js:69:1216

Please use FireBug tool of the Firefox browser and check these errors and correct those to improve the performance of the website. I have also turned off the normal caching for the website and enabled WordPress caching at https://www1.ipage.com/controlpanel/cachecontrol/index.html . This should surely improve the website loading speed once the issues with the scripts are corrected. There is no server side issues for the functionality/performance of the website.
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