Amélioration temps affichage des pages

WRInaute occasionnel
Bonjour,

J'essaye d'améliorer le temps d'affichage de mes pages, et dans le pagespeed de google il me parle de ressources non hébergées sur mon site, savez-vous comment faire pour améliorer le temps d'affichage/téléchargement de celles-ci ?

Code:
Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Learn more
Leverage browser caching for the following cacheable resources:
http://dx3723.tinyurl.com/pixel.gif/cb4c716d-e1ef-48fa-8001-f6a347ea8bef (expiration not specified)
http://images.eplayer.performgroup.com/javaImages/29/7b/0,,~12155689,00.jpeg (expiration not specified)
http://images.eplayer.performgroup.com/javaImages/81/7b/0,,~12155777,00.jpeg (expiration not specified)
http://cdn.api.twitter.com/1/urls/count.json?url=http%3A%2F%2Fwww.livefoot.fr%2F&callback=twttr.receiveCount (3.2 minutes)
http://wwwimages.adobe.com/www.adobe.com/images/shared/download_buttons/get_flash_player.gif (15 minutes)
http://platform.twitter.com/widgets.js (30 minutes)
https://apis.google.com/js/plusone.js (30 minutes)
http://pagead2.googlesyndication.com/pagead/osd.js (60 minutes)
http://pagead2.googlesyndication.com/pagead/show_ads.js (60 minutes)
http://tap-cdn.rubiconproject.com/partner/scripts/rubicon/alice.js?pc=8216/15528&ptc=34994 (60 minutes)
http://tap-cdn.rubiconproject.com/partner/scripts/rubicon/page_parser.js (60 minutes)
http://www.googletagservices.com/tag/js/gpt.js (60 minutes)
https://oauth.googleusercontent.com/gadgets/js/core:rpc:shindig.random:shindig.sha1.js?c=2 (60 minutes)
http://ads.rubiconproject.com/ad/8216.js (2 hours)

Merci beaucoup
 
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