1An overview of the six time values available from curl_easy_getinfo()
2
3curl_easy_perform()
4    |
5    |--NT
6    |--|--CT
7    |--|--|--PT
8    |--|--|--|--ST
9          |--|--|--TT
10    |--|--|--|--|--RT
11
12NT = CURLINFO_NAMELOOKUP_TIME. The time it took from the start until the name
13     resolving was completed.
14CT = CURLINFO_CONNECT_TIME. The time it took from the start until the connect
15     to the remote host (or proxy) was completed.
16PT = CURLINFO_PRETRANSFER_TIME. The time it took from the start until the file
17     transfer is just about to begin. This includes all pre-transfer commands
18     and negotiations that are specific to the particular protocol(s)
19     involved.
20ST = CURLINFO_STARTTRANSFER_TIME. The time it took from the start until the
21     first byte is just about to be transferred.
22TT = CURLINFO_TOTAL_TIME. Time of the previous transfer. This time does not
23     include the connect time (CT), so if you want the complete operation
24     time, you should add that.
25RT = CURLINFO_REDIRECT_TIME. The time it took for all redirection steps
26     include name lookup, connect, pretransfer and transfer before final
27     transaction was started. So, this is zero if no redirection took place.
28