It’s a well-known problem among WordPress specialists that GoDaddy overloads their servers and you get tons of performance problems with it. If you are at GoDaddy because they are inexpensive let me recommend a host I’ve been using for years: A Small Orange. You can get a minimum account there for $US25/year, their Tiny plan.
The other solution is to set up a cron task or scheduled task to call your home page once per minute or maybe once every 5 minutes and that should keep it loading fast. Since I don’t know exactly how GoDaddy works I’ll give you some pages that should help you figure out how: