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doc/go1.12: updates for runtime and compiler

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Change-Id: Ifb16fd28105efd05cebbd615b52e45330b77cede
Reviewed-on: https://go-review.googlesource.com/c/154600
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Austin Clements 2018-12-17 15:26:36 -05:00
parent a1aafd8b28
commit 179acf4083
1 changed files with 47 additions and 11 deletions
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58
doc/go1.12.html
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@ -203,6 +203,23 @@ for {
Language changes made before Go 1.12 are not consistently enforced.
</p>
<p><!-- CL 147160 -->
The compiler toolchain now uses different conventions to call Go
functions and assembly functions. This should be invisible to users,
except for calls that simultaneously cross between Go and
assembly <em>and</em> cross a package boundary. If linking results
in an error like "relocation target not defined for ABIInternal (but
is defined for ABI0)", please refer to help section of the ABI
design document.
TODO(austin): Link to the design doc.
</p>
<p><!-- CL 145179 -->
There have been many improvements to the DWARF debug information
produced by the compiler, including improvements to argument
printing and variable location information.
</p>
<h3 id="godoc">Godoc</h3>
<p>
@ -211,6 +228,36 @@ for {
for command-line help output instead.
</p>
<h3 id="trace">Trace</h3>
<p><!-- CL 60790 -->
The trace tool now supports plotting mutator utilization curves,
including cross-references to the execution trace. These are useful
for analyzing the impact of the garbage collector on application
latency and throughput.
</p>
<h2 id="runtime">Runtime</h2>
<p><!-- CL 138959 -->
Go 1.12 significantly improves the performance of sweeping when a
large fraction of the heap remains live. This reduces allocation
latency immediately following a garbage collection.
</p>
<p><!-- CL 139719 -->
The Go runtime now releases memory back to the operating system more
aggressively, particularly in response to large allocations that
can't reuse existing heap space.
</p>
<p><!-- CL 135395 -->
On Linux, the Go runtime now releases memory back to the operating
system only when the OS is under memory pressure. This is more
efficient, but means a process's RSS (resident set size) won't
decrease unless the OS is running out of memory.
</p>
<h2 id="library">Core library</h2>
<p>
@ -231,7 +278,6 @@ for {
<!-- CL 146058: https://golang.org/cl/146058: It is invalid to convert a nil unsafe.Pointer to uintptr and back, with arithmetic.: cmd/compile: assume unsafe pointer arithmetic generates non-nil results -->
<!-- CL 141977: https://golang.org/cl/141977: cmd/doc: add -all flag to print all documentation for package -->
<!-- CL 146898: https://golang.org/cl/146898: cmd/link, runtime: add initial cgo support for ppc64 -->
<!-- CL 60790: https://golang.org/cl/60790: The trace tool now supports plotting mutator utilization curves, including cross-references to the execution trace. These are useful for analyzing the impact of the garbage collector on application latency and throughput.: cmd/trace: add minimum mutator utilization (MMU) plot -->
<!-- CL 115677: https://golang.org/cl/115677: cmd/vet: check embedded field tags too -->
<dl id="bufio"><dt><a href="/pkg/bufio/">bufio</a></dt>
<dd>
@ -541,16 +587,6 @@ for {
</dl><!-- regexp -->
<dl id="runtime"><dt><a href="/pkg/runtime/">runtime</a></dt>
<dd>
<p><!-- CL 135395 -->
On Linux, the Go runtime now releases memory only when the OS is under memory
pressure. This is more efficient, but means a process's RSS (resident set size)
won't decrease unless the OS is running out of memory.
</p>
</dl><!-- runtime -->
<dl id="runtime/debug"><dt><a href="/pkg/runtime/debug/">runtime/debug</a></dt>
<dd>
<p><!-- CL 144220 -->