CURLINFO_PRETRANSFER_TIME_T - get the time until the file transfer start

#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PRETRANSFER_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 file transfer is just about to begin.

This time-stamp includes all pre-transfer commands and negotiations that are specific to the particular protocol(s) involved. It includes the sending of the protocol-specific instructions that trigger a transfer.

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.


int main(void)
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode res;
    curl_off_t pretransfer;
    curl_easy_setopt(curl, CURLOPT_URL, "");
    res = curl_easy_perform(curl);
    if(CURLE_OK == res) {
      res = curl_easy_getinfo(curl, CURLINFO_PRETRANSFER_TIME_T, &pretransfer);
      if(CURLE_OK == res) {
        printf("Time: %" CURL_FORMAT_CURL_OFF_T ".%06ld\n",
               pretransfer / 1000000,
               (long)(pretransfer % 1000000));
    /* always cleanup */

Added in 7.61.0

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

CURLINFO_CONNECT_TIME(3), CURLINFO_PRETRANSFER_TIME_T(3), curl_easy_getinfo(3), curl_easy_setopt(3)

2024-05-22 libcurl