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High performance HTTP server stress & benchmark utility.

Inspired by weighttp tool.

Main features:

  • event driven (low memory footprint, large number of connections)
  • multi-threaded (uses all cores of your CPU)
  • SSL support (via GNUTLS library) with cipher suite selection

Compared to weighttp, httpress offers the following improvements:

  • evenly distributes load between threads; does not allow one thread to finish much earlier than others
  • promptly timeouts stucked connections, forces all hanging connections to close after the main run, does not allow hanging or interrupted connections to affect the measurement
  • SSL support


httpress <options> <url>
  -n num   number of requests     (default: 1)
  -t num   number of threads      (default: 1)
  -c num   concurrent connections (default: 1)
  -k       keep alive             (default: no)
  -z pri   GNUTLS cipher priority (default: NORMAL)
  -h       show this help

example: httpress -n 10000 -c 100 -t 4 -k http://localhost:8080/index.html


  • Depends on libev library
  • Depends on GnuTLS library (if compiled with SSL support)

Building from source

  1. Prerequisite: libev 4 library (your distro might have it in repo; otherwise build from source)
  2. SSL prerequisite: GnuTLS 3.0 library (better build from source)
  3. Download httpress source
  4. Run make or make -f Makefile.nossl
  5. Collect executable from bin subdirectory