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CURLINFO_STARTTRANSFER_TIME_T(3) curl_easy_getinfo options CURLINFO_STARTTRANSFER_TIME_T(3)

CURLINFO_STARTTRANSFER_TIME_T - get the time until the first byte is received

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

Pass a pointer to a curl_off_t to receive the time, in microseconds, it took from the start until the first byte is received by libcurl. This includes CURLINFO_PRETRANSFER_TIME_T(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

curl = curl_easy_init();
if(curl) {
  curl_off_t start;
  curl_easy_setopt(curl, CURLOPT_URL, url);
  res = curl_easy_perform(curl);
  if(CURLE_OK == res) {
    res = curl_easy_getinfo(curl, CURLINFO_STARTTRANSFER_TIME_T, &start);
    if(CURLE_OK == res) {
      printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld", start / 1000000,
             (long)(start % 1000000));
    }
  }
  /* always cleanup */
  curl_easy_cleanup(curl);
}

Added in 7.61.0

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

curl_easy_getinfo(3), curl_easy_setopt(3), CURLINFO_STARTTRANSFER_TIME(3)
November 26, 2021 libcurl 7.83.1

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