in curl what is the load time for url request

in curl what is the load time for url request

i am finding Load Time for the url request using curl and using
$info=curl_getinfo($handle);
print_r($info);
which is the load time
pretranver time
namelook time
connect time
start transvertime
look up time
if not in these then how do i find and also primary_ip is the ip address
of the url