CURLINFO_SPEED_DOWNLOAD(3)

CURLINFO_SPEED_DOWNLOAD3

Download speed

Usage

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

Overview

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.

Protocols

This functionality affects all supported protocols

Examples

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode result;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
    /* Perform the request */
    result = curl_easy_perform(curl);
    if(result == CURLE_OK) {
      double speed;
      result = curl_easy_getinfo(curl, CURLINFO_SPEED_DOWNLOAD, &speed);
      if(result == CURLE_OK) {
        printf("Download speed %.0f bytes/sec\n", speed);
      }
    }
  }
}

Deprecated

Deprecated since 7.55.0.

Return value

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).

Releases

6 releases since Debian 9 (Stretch); the text changed 5 times.

  1. 9
  2. 10
  3. 11
  4. 12
  5. 13
  6. Arch

Availability

Added in curl 7.4.1

From curl 8.23.0-1 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.