CURLINFO_SPEED_DOWNLOAD(3) Library Functions Manual CURLINFO_SPEED_DOWNLOAD(3)
NAME
CURLINFO_SPEED_DOWNLOAD - get download speed
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_SPEED_DOWNLOAD,
double *speed);
DESCRIPTION
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
EXAMPLE
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
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);
}
}
}
}
DEPRECATED
Deprecated since 7.55.0.
AVAILABILITY
Added in curl 7.4.1
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).
SEE ALSO
CURLINFO_SIZE_UPLOAD_T(3), CURLINFO_SPEED_UPLOAD(3), curl_easy_get-
info(3), curl_easy_setopt(3)
libcurl 2026-07-12 CURLINFO_SPEED_DOWNLOAD(3)
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