DOKK / manpages / debian 12 / libcurl4-doc / CURLINFO_SPEED_DOWNLOAD.3.en
CURLINFO_SPEED_DOWNLOAD(3) curl_easy_getinfo options 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", speed);
}
} }

Added in 7.4.1. Deprecated since 7.55.0.

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),

January 2, 2023 libcurl 7.88.1