DOWNLOAD OTP 18.0

Erlang/OTP 18.0 has been released!

OTP 18.0 Readme File

OTP 18.0 Source File (64.9 MB)

OTP 18.0 Windows 32-bit Binary File (93.4 MB)

OTP 18.0 Windows 64-bit Binary File (95.1 MB)

OTP 18.0 HTML Documentation File (32.2 MB)

OTP 18.0 Man Pages File (1.3 MB)

Some highlights of the release are:
 

  • Starting from 18.0 Erlang/OTP is released under the APL 2.0 (Apache Public License)
  • erts: The time functionality has been extended. This includes a new API for
    time, as well as "time warp" modes which alters the behavior when system time changes. You are strongly encouraged to use the new API instead of the old API based on erlang:now/0. erlang:now/0 has been deprecated since it is a scalability bottleneck.
    For more information see the Time and Time Correction chapter of the ERTS User's Guide. Here is a link http://www.erlang.org/doc/apps/erts/time_correction.html
  • erts: Beside the API changes and time warp modes a lot of scalability and performance improvements regarding time management has been made. Examples are: 
    • scheduler specific timer wheels, 
    • scheduler specific BIF timer management, 
    • parallel retrieval of monotonic time and system time on OS:es that support it.
  • erts: The previously introduced "eager check I/O" feature is now enabled by default.
  • erts/compiler: enhanced support for maps. Big maps new uses a HAMT (Hash Array Mapped Trie) representation internally which makes them more efficient. There is now also support for variables as map keys.  
  • dialyzer: The -dialyzer() attribute can be used for suppressing warnings
    in a module by specifying functions or warning options.
    It can also be used for requesting warnings in a module.
  • ssl: Remove default support for SSL-3.0 and added padding check for TLS-1.0 due to the Poodle vulnerability.
  • ssl: Remove default support for RC4 cipher suites, as they are consider too weak.
  • stdlib: Allow maps for supervisor flags and child specs
  • stdlib: New functions in ets:
    • take/2. Works the same as ets:delete/2 but
                also returns the deleted object(s).
    • ets:update_counter/4 with a default object as
                argument

Additional Packages

Erlang/OTP is also distributed in pre built packages courtesy of Erlang Solutions.
There are pre built packages for platforms such as: Raspbian, Ubuntu, Fedora, OS X, and more!.
Erlang Solutions Downloads page

License

From OTP 18 and above, Erlang/OTP is distributed under Apache License 2.0. The previous versions are distributed under the Erlang Public License (EPL) that is a derivative work of the Mozilla Public License (MPL). It contains terms which differ from MPL, mainly in terms of jurisdiction. The license is constructed in accordance with the laws of Sweden.

To help you understand the legal text there is an EPL Translation. The legal text is the license, so if you have any doubts, refer to the legal text.

Available releases

PDF files are included in the Windows installer and in the HTML documentation tarballs, starting with the R13B03 release.

There is a file containing MD5 checksums for all files in the download directory, also reachable through rsync rsync.erlang.org::erlang-download

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