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CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE

Section: C Library Functions (3)
Updated: 2026-03-19
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NAME

CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE - chunk length threshold for pipelining

SYNOPSIS

#include <curl/curl.h>

CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE,
                            long size);

DESCRIPTION

No function since pipelining was removed in 7.62.0.

Pass a long with a size in bytes. If a transfer in a pipeline is currently processing a chunked (Transfer-encoding: chunked) request with a current chunk length larger than CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE(3), that pipeline is not considered for additional requests, even if it is shorter than CURLMOPT_MAX_PIPELINE_LENGTH(3).

DEFAULT

0, which means that penalization is inactive.

PROTOCOLS

This functionality affects http only

EXAMPLE

int main(void)
{
  CURLM *m = curl_multi_init();
  long maxchunk = 10000;
  curl_multi_setopt(m, CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE, maxchunk);
}

AVAILABILITY

Added in curl 7.30.0

RETURN VALUE

curl_multi_setopt(3) returns a CURLMcode indicating success or error.

CURLM_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).