I am looking for a CDN service for my blog? My Blog is kind a small one, so I want CDN to be free.
i think they let u compare cloudflare and incapsula download speed live in case u decide to choose either of them.
ps: google cdn is also good but i guess u have to apply for their service somehow
If your blog is kind of small, there probably isn't much use for a CDN in the first place.
Anyway. First of, one would have to know whether you are using a hosted WordPress solution e.g. from wordpress.com or you are self-hosted. While there are WP plugins for CDN not all of them will give you much benefit or will work with any CDN network.
Next up you HAVE to evaluate your content and how a CDN will effect it (your site).
The idea behind the CDN is that your content is distributed using servers close to your visitor(s) and using multiple domains so they are not effected by per-server-connection-limits or latency.
So before digging into CDN and stuff you may just want to see what you can already do by yourself.
Like, you can already speedup your sites performance by having the content loaded from e.g. "www.example.com", images via "images.example.com" and for example scripts and CSS via "static.example.com". This way your already triple the connections a single user has to retrieve the content.
If your site is using HTTP 1.1 you might want to try switching to draft 1.0. Most browsers support more connections per server on the 1.0 draft. Assuming the httpd allows persistent connections via draft 1.0 you are already in for a speed-up.
For testing purpose you can try using Coral or CoBlitz. They don't require any real setup but using a custom URL to access your site.
As for free services there are CloudFlare and Incapsula
Thank you for your answer...