Erlang/OTP 23.1.2

This release of Erlang/OTP can be built from source or installed using pre-built packages for your OS or third-party tools (such as kerl or asdf).

docker run -it erlang:23.1.2
Patch Package OTP 23.1.2
Git Tag OTP-23.1.2
Date 2020-11-05
Issue Id
System OTP
Release 23

compiler-7.6.5 #

The compiler-7.6.5 application can be applied independently of other applications on a full OTP 23 installation.

Related Id(s):

Fixed a bug in the boolean optimization pass that caused the compiler to confuse different clauses.

Full runtime dependencies of compiler-7.6.5: crypto-3.6, erts-11.0, hipe-3.12, kernel-7.0, stdlib-3.13

erts-11.1.2 #

The erts-11.1.2 application can be applied independently of other applications on a full OTP 23 installation.


Fixed bugs causing issues when enabling the ERTS internal allocators on a system built with the undocumented and unsupported SMALL_MEMORY feature.

Related Id(s):
ERL-1343 , OTP-15618

The inet driver used to use 16 as maximum elements in an I/O vector passed to writev() (and WSASend() on Windows). When the data to send contained lots of elements, this caused a performance degradation since repeated calls to writev() had to be made to a much larger extent. The inet driver now looks up actual maximum amount of elements that can be used on the system, instead of just assuming 16. On most systems this will result in a maximum amount of I/O vector elements of 1024.

As of OTP 23.0 the term encoding of signals to send over the distribution are encoded into I/O vectors of buffers instead of into a single buffer. Reference counted binaries are referred to directly from the I/O vector instead of being copied into the single buffer. That is, Erlang signals containing huge amounts of reference counted binaries was effected by this performance degradation.

Related Id(s):

In the distributed case, a faulty reply option in a call to the spawn_request() BIF erroneously caused a badarg exception instead of a badopt error message reply.

Full runtime dependencies of erts-11.1.2: kernel-7.0, sasl-3.3, stdlib-3.13