doc/go1.15: runtime release notes
Change-Id: Ie37e993e840df2c063dee98fa3f6eca8e8713ca3
Reviewed-on: https://go-review.googlesource.com/c/go/+/236177
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/doc/go1.15.html b/doc/go1.15.html
index 37fa76c6..24a1c0d 100644
--- a/doc/go1.15.html
+++ b/doc/go1.15.html
@@ -55,6 +55,11 @@
on Windows.
</p>
+<p><!-- CL 211139 -->
+ Go-built DLLs no longer cause the process to exit when it receives a
+ signal (such as Ctrl-C at a terminal).
+</p>
+
<h3 id="android">Android</h3>
<p> <!-- golang.org/cl/235017 golang.org/issue/38838 -->
@@ -64,6 +69,8 @@
planned to become the default NDK linker in a future NDK version.
</p>
+<h3 id="riscv">RISC-V</h3>
+
<p>
TODO
</p>
@@ -192,6 +199,17 @@
<h2 id="runtime">Runtime</h2>
+<p><!-- CL 232862 -->
+ Go now retries system calls that return <code>EINTR</code>. This
+ became more common in Go 1.14 with the addition of asynchronous
+ preemption, but is now handled transparently.
+</p>
+
+<p><!-- CL 221182, CL 229998 -->
+ Allocation of small objects now performs much better at high core
+ counts, and has lower worst-case latency.
+</p>
+
<p>
TODO
</p>
@@ -209,6 +227,16 @@
updated to satisfy the safety rules.
</p>
+<p><!-- CL 230544, CL 231397 -->
+ Go 1.15 reduces typical binary sizes by around 5% compared to Go
+ 1.14 by eliminating certain types of GC metadata and more
+ aggressively eliminating unused type metadata.
+</p>
+
+<p><!-- CL 222661 -->
+ TODO: -spectre flags
+</p>
+
<h2 id="linker">Linker</h2>
<p>
@@ -486,6 +514,7 @@
<code>int</code>, <code>int8</code>, <code>int16</code>, <code>int32</code>, <code>int64</code>, <code>string</code>,
<code>uint</code>, <code>uint8</code>, <code>uint16</code>, <code>uint32</code>, <code>uint64</code>, <code>uintptr</code>,
then the value will be printed, instead of just its address.
+ Previously, this was only true for values of exactly these types.
</p>
<p><!-- CL -->
@@ -499,16 +528,22 @@
In earlier releases the behavior was unpredictable.
</p>
- <p><!-- CL 211139 -->
- TODO: <a href="https://golang.org/cl/211139">https://golang.org/cl/211139</a>: do not exit(2) if a Go built DLL receives a signal
+ <p><!-- CL 216557 -->
+ Several functions, including
+ <a href="/pkg/runtime/#ReadMemStats"><code>ReadMemStats</code></a>
+ and
+ <a href="/pkg/runtime/#GoroutineProfile"><code>GoroutineProfile</code></a>,
+ no longer block if a garbage collection is in progress.
</p>
<p><!-- CL 216401 -->
- TODO: <a href="https://golang.org/cl/216401">https://golang.org/cl/216401</a>: prevent allocation when converting small ints to interfaces
+ Converting small integer values into an interface value no
+ longer causes allocation.
</p>
- <p><!-- CL 220578 -->
- TODO: <a href="https://golang.org/cl/220578">https://golang.org/cl/220578</a>: allow float syscall return values on windows amd64
+ <p><!-- CL 216818 -->
+ Non-blocking receives on closed channels now perform as well as
+ non-blocking receives on open channels.
</p>
</dd>
</dl>
@@ -564,6 +599,12 @@
Some programs that set <code>Setctty</code> will need to change
the value of <code>Ctty</code> to use a child descriptor number.
</p>
+
+ <p><!-- CL 220578 -->
+ It is now possible to call system calls that return floating
+ point values on windows/amd64.
+ TODO: Point to (write?) documentation on how to do this.
+ </p>
</dd>
</dl>
