I was having problems with slowness at first on the front-end of my blog but really began to notice it when the back-end started to crawwwwl.
So I started doing some tests with the plugins I had installed. I knew I had a problem when at first W3TC would not deactivate. It just hung there. When I finally managed to disable it, the back-end of wordpress was faster than ever before and the front-end didn't hang at loading. I reactivated W3TC and all was fine. However after a few days things begin to crawl again. I repeat the same steps and boom the site is blazing fast.
So my question is.... whats going on here? W3TC is supposed to speed up sites not slow them down. Anyone having similar issues?