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@@ -31,121 +31,6 @@
</header>
<p>This document describes the changes made to the STDLIB application.</p>
-<section><title>STDLIB 3.8</title>
-
- <section><title>Improvements and New Features</title>
- <list>
- <item>
- <p> A new <c>rand</c> module algorithm, <c>exro928ss</c>
- (Xoroshiro928**), has been implemented. It has got a
- really long period and good statistical quality for all
- output bits, while still being only about 50% slower than
- the default algorithm. </p><p> The same generator is also
- used as a long period counter in a new <c>crypto</c>
- plugin for the <c>rand</c> module, algorithm
- <c>crypto_aes</c>. This plugin uses AES-256 to scramble
- the counter which buries any detectable statistical
- artifacts. Scrambling is done in chunks which are cached
- to get good amortized speed (about half of the default
- algorithm). </p>
- <p>
- Own Id: OTP-14461 Aux Id: PR-1857 </p>
- </item>
- <item>
- <p>
- Types related to server naming and starting have been
- exported from <c>gen_statem</c>. These are:
- <c>server_name/0</c>, <c>server_ref/0</c>,
- <c>start_opt/0</c>, <c>start_ret/0</c> and
- <c>enter_loop_opt/0</c>.</p>
- <p>
- Own Id: OTP-14724 Aux Id: PR-2056 </p>
- </item>
- <item>
- <p>
- The default algorithm for the <c>rand</c> module has been
- changed to <c>exsss</c> (Xorshift116**) which is a
- combination of the Xorshift116 (<c>exsp</c>) state update
- and a new scrambler "StarStar" from the 2018 paper
- "Scrambled Linear Pseudorandom Number Generators" by
- David Blackman and Sebastiano Vigna. This combination
- should not have the caveat of weak low bits that the
- previous default algorithm(s) have had, with the cost of
- about 10% lower speed. See GitHub pull request #1969.</p>
- <p>
- Own Id: OTP-14731 Aux Id: PR-1969 </p>
- </item>
- <item>
- <p>
- The generic state machine behaviour <c>gen_statem</c> has
- gotten code cleanup and documentation improvements from
- GitHub Pull Request #1855, even though the PR itself was
- rejected.</p>
- <p>
- Own Id: OTP-14737 Aux Id: PR-1855 </p>
- </item>
- <item>
- <p>
- Update Unicode specification to version 11.0.</p>
- <p>
- Own Id: OTP-15111</p>
- </item>
- <item>
- <p>
- ETS option <c>write_concurrency</c> now also affects and
- improves the scalability of <c>ordered_set</c> tables.
- The implementation is based on a data structure called
- contention adapting search tree, where the lock
- granularity adapts to the actual amount of concurrency
- exploited by the applications in runtime.</p>
- <p>
- Own Id: OTP-15128</p>
- </item>
- <item>
- <p>
- Optimized <c>maps:new/0</c> with trivial Erlang
- implementation, making use of literal terms (the empty
- map) not needing dynamic heap allocation.</p>
- <p>
- Own Id: OTP-15200 Aux Id: PR-1878 </p>
- </item>
- <item>
- <p>The <c>gen_*</c> behaviours have been changed so that
- if logging of the last N messages through
- <c>sys:log/2,3</c> is active for the server, this log is
- included in the terminate report.</p> <p>To accomplish
- this the format of "System Events" as defined in the man
- page for <c>sys</c> has been clarified and cleaned up, a
- new function <c>sys:get_log/1</c> has been added, and
- <c>sys:get_debug/3</c> has been deprecated. Due to these
- changes, code that relies on the internal badly
- documented format of "System Events", need to be
- corrected.</p>
- <p>
- *** POTENTIAL INCOMPATIBILITY ***</p>
- <p>
- Own Id: OTP-15381</p>
- </item>
- <item>
- <p>
- The <c>gen_statem</c> behaviour engine loop has been
- optimized for better performance in particular when the
- callback module returns some actions, that is better
- performance for more realistic applications than the Echo
- Benchmark.</p>
- <p>
- Own Id: OTP-15452</p>
- </item>
- <item>
- <p> Use <c>ssh</c> as the default remote shell. </p>
- <p>
- Own Id: OTP-15633 Aux Id: PR-1787 </p>
- </item>
- </list>
- </section>
-
-</section>
-
<section><title>STDLIB 3.7.1</title>
<section><title>Fixed Bugs and Malfunctions</title>