Manpages - CURLINFO_SPEED_DOWNLOAD.3

CURLINFO_SPEED_DOWNLOAD - get download speed

#include <curl/curl.h>

CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SPEED_DOWNLOAD, double *speed);

Pass a pointer to a double to receive the average download speed that curl measured for the complete download. Measured in bytes/second.

CURLINFO_SPEED_DOWNLOAD_T(3) is a newer replacement that returns a more sensible variable type.

  CURL *curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

    /* Perform the request */
    res = curl_easy_perform(curl);

    if(!res) {
      double speed;
      res = curl_easy_getinfo(curl, CURLINFO_SPEED_DOWNLOAD, &speed);
      if(!res) {
        printf("Download speed %.0f bytes/sec\n", ul);
      }
    }
  }

Added in 7.4.1

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

*curl_easy_getinfo*(3), *curl_easy_setopt*(3), *CURLINFO_SPEED_UPLOAD*(3), *CURLINFO_SIZE_UPLOAD_T*(3),