Erlang/OTP 19.1 is a service release containing mostly bug fixes, as well as a number of new features and characteristics improvements.
Some highlights of the release are:
erts: Improved dirty scheduler support. A purge of a module will not have to wait for completion of all ongoing dirty NIF calls.
erts: Improved accuracy of timeouts on MacOS X.
kernel: Add net_kernel:setopts/2 and net_kernel:getopts/2 to control options for distribution sockets in runtime.
asn1: Compiling multiple ASN.1 modules in the same directory with parallel make (make -j) should now be safe.
httpd: support for PUT and DELETE in mod_esi
~30 contributions since 19.0