For example, my URL is:www.site.comFor SEO, PageSpeed and Server Tweaking for ultimate performance, and speed, my code places static files like JavaScript, CSS and Images on my CDN:www.site-cdn.com (seperate server)Will it help if I have a script which randomly loads one of the these:www.site-cdn1.com www.site-cdn2.com (on the same origin as cd1 but different dedicated IP) www.site-cdn3.com (on the same origin as cd1 but different dedicated IP)
Two URL CDNs are better than one for SEO and Speed?
seo;cdn;page speed
This won't really have an effect on your SEO as page speed really only affect the slowest 1% of web pages out there. Basically a slow web page may be penalized but a fast web page will not receive a bonus.In your scenario, splitting up which CDN you use also shouldn't make a difference since the files will be coming from the same server. If your different CDN addressed were located at different parts of the country or world then it would help your page loading performance as the user would get those static files from their local CDN rather then from one potentially on the other side of the globe.