CURLMOPT_PIPELINING (3) - Linux Man Pages
CURLMOPT_PIPELINING: enable/disable HTTP pipelining
NAMECURLMOPT_PIPELINING - enable/disable HTTP pipelining
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_PIPELINING, bool onoff);
DESCRIPTIONSet the onoff parameter to 1 to make libcurl use HTTP pipelining for HTTP transfers done using this multi handle, as far as possible. This means that if you add a second request that can use an already existing connection, the second request will be "piped" on the same connection rather than being executed in parallel.
When using pipelining, there are also several other related options that are interesting to tweak and adjust to alter how libcurl spreads out requests on different connections or not etc.
AVAILABILITYAdded in 7.16.0
RETURN VALUEReturns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
SEE ALSOCURLMOPT_MAX_PIPELINE_LENGTH(3), CURLMOPT_PIPELINING_SITE_BL(3), CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE(3), CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE(3), CURLMOPT_MAX_HOST_CONNECTIONS(3), CURLMOPT_MAXCONNECTS(3), CURLMOPT_MAX_HOST_CONNECTIONS(3),