CURLINFO_NAMELOOKUP_TIME - Man Page

#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_NAMELOOKUP_TIME,
                           double *timep);

Pass a pointer to a double to receive the total time in seconds from the start until the name resolving was completed.

When a redirect is followed, the time from each request is added together.

See also the TIMES overview in the curl_easy_getinfo(3) man page.

This functionality affects all supported protocols

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    double namelookup;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    res = curl_easy_perform(curl);
    if(CURLE_OK == res) {
      res = curl_easy_getinfo(curl, CURLINFO_NAMELOOKUP_TIME, &namelookup);
      if(CURLE_OK == res) {
        printf("Time: %.1f", namelookup);
      }
    }
    /* always cleanup */
    curl_easy_cleanup(curl);
  }
}

Added in curl 7.4.1

curl_easy_getinfo(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

CURLINFO_NAMELOOKUP_TIME_T(3), curl_easy_getinfo(3), curl_easy_setopt(3)

curl_easy_getinfo(3), CURLINFO_NAMELOOKUP_TIME_T(3).