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doc/go1.1.html: performance

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An overview is all that's required.

R=golang-dev, remyoudompheng, bradfitz, adg
CC=golang-dev
https://golang.org/cl/7577050
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Rob Pike 2013-03-23 08:29:59 -07:00
parent bfb32dc6d1
commit 4c48e4ecb5
1 changed files with 21 additions and 6 deletions
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doc/go1.1.html
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@ -323,14 +323,29 @@ to convert the code to Go 1.0 first.
<h2 id="performance">Performance</h2>
<p>
TODO introduction
The performance of code compiled with the Go 1.1 gc tool suite should be noticeably
better for most Go programs.
Typical improvements relative to Go 1.0 seem to be about 30%-40%, sometimes
much more, but occasionally less or even non-existent.
There are too many small performance-driven tweaks through the tools and libraries
to list them all here, but the following major changes are worth noting:
</p>
<ul>
<li>TODO better code generation (inlining, ...?)</li>
<li>TODO parallel gc</li>
<li>TODO more precise gc</li>
<li>TODO networking is more efficient (known to runtime)</li>
<li>The gc compilers generate better code in many cases, most noticeably for
floating point on the 32-bit Intel architecture.</li>
<li>The gc compilers do more in-lining, including for some operations
in the run-time such as <a href="/pkg/builtin/#append"><code>append</code></a>
and interface conversions.</li>
<li>There is a new implementation of Go maps with significant reduction in
memory footprint and CPU time.</li>
<li>The garbage collector has been made more parallel, which can reduce
latencies for programs running on multiple CPUs.</li>
<li>The garbage collector is also more precise, which costs a small amount of
CPU time but can reduce the size of the heap significantly, especially
on 32-bit architectures.</li>
<li>Due to tighter coupling of the run-time and network libraries, fewer
context switches are required on network operations.</li>
</ul>
<h2 id="library">Changes to the standard library</h2>
@ -598,7 +613,7 @@ a string, rather than a float64.
</li>
<li>
The <a href="/pkg/encoding/xml/"><code>endoding/xml</code></a> package
The <a href="/pkg/encoding/xml/"><code>encoding/xml</code></a> package
has a new function,
<a href="/pkg/encoding/xml/#EscapeText"><code>EscapeText</code></a>,
which writes escaped XML output,