> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.wpcompress.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Testing with Live Mode (Real-time Optimization + CDN)

# Testing with live mode (Real-time optimization + CDN)
When testing with live optimization, make sure you see a CDN cache HIT to get our fastest speeds, the cache and optimization has to go to the edge locations over time and gets faster as more viewers see your content!


![](https://storage.crisp.chat/users/helpdesk/website/49a2bcd521bcc400/screen-shot-2023-01-19-at-9095_hntfom.png)

If it says MISS or EXPIRED you're not getting the fastest speeds yet - so re-test and watch your images and scripts fly!

|| A Content Delivery Network (CDN) caches content to reduce the load on the origin server and improve the delivery speed to end users. When a user requests content that is already cached on a CDN node, that node can respond to the request without having to retrieve the content from the origin server. This is known as a "cache hit," and it results in faster delivery of the content and less strain on the origin server.