yes i think also its some thing is issue with cache, without login its open slow but its open, but when i login and close browser and re-login its take too much time, some time its take alote and alote time and just loading but didn't open site. the hosting person just check and said its cache issue check with your website developer .
i disable all 3rd party plugins and applications, and advatisment on home screen but still its slow, and before its just home page issue now its all pages issue and all sections issues