CURLINFO_STARTTRANSFER_TIME(3) Library Functions Manual CURLINFO_STARTTRANSFER_TIME(3)

CURLINFO_STARTTRANSFER_TIME - get the time until the first byte is received

#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_STARTTRANSFER_TIME,
                           double *timep);

Pass a pointer to a double to receive the time, in seconds, it took from the start until the first byte is received by libcurl. This includes CURLINFO_PRETRANSFER_TIME(3) and also the time the server needs to calculate the result.

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.

All

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

Added in 7.9.2

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

CURLINFO_STARTTRANSFER_TIME_T(3), CURLOPT_TIMEOUT(3), curl_easy_getinfo(3), curl_easy_setopt(3)

2024-05-22 libcurl