Does cache router work with Drupal Core caching?

Issue Summary

Hi,

My understanding is that Cache router takes the data that Drupal was going to cache, and caches it using different technologies which could be more efficient - is that right??

If this is the case then I would assume that if all Drupal native caching is turned off, then there will be no caching done by cache router??

I ask because I'm looking for a granular approach, so I have caching set up on my site with the cache in Panels and the cache in Views. These both use the native Drupal cache. If I could add Cache Router to the mix, to divert the data going to Drupal Cache to go to one of the cache router options, then this would be ideal!

Also, what's the best way to test page speeds? Is there a 3rd party app that can maybe simulate some load? Would jmeter do this job?

Many thanks, Joe