no longer use requestStart since contains the wrong value in case of connection failure and retry
no longer use requestStart since contains the wrong value in case of connection failure and retry

FredXue/boomerang,lognormal/boomerang,forcedotcom/kylie,sdgdsffdsfff/boomerang,yahoo/boomerang,levexis/boomerang,levexis/boomerang,sdgdsffdsfff/boomerang,forcedotcom/kylie,lognormal/boomerang,FredXue/boomerang