_content/blog: move go12 to go1.2
All blog posts for major Go releases include a dot, other than the one for Go 1.2. Fix the inconsistency and add a redirect from the old page. Change-Id: I2f08142b6e802808be49adb5abf1562ab2d6fd73 Reviewed-on: https://go-review.googlesource.com/c/website/+/603795 Reviewed-by: Dmitri Shuralyov <dmitshur@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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@ -0,0 +1,80 @@
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---
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title: Go 1.2 is released
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date: 2013-12-01
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by:
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- Andrew Gerrand
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tags:
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- release
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summary: Go 1.2 adds test coverage results, goroutine preemption, and more.
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---
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We are pleased to announce the release of Go 1.2, the latest stable version of
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the Go Programming Language.
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Binary distributions may be downloaded from the
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[usual place](/doc/install) or if you prefer to
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[compile from source](/doc/install/source) you should use
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the `release` or `go1.2` tags.
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This new release comes nearly seven months after the release of Go 1.1 in May,
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a much shorter period than the 14 months between 1.1 and 1.0.
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We anticipate a comparable interval between future major releases.
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[Go 1.2](/doc/go1.2) includes a couple of minor
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language changes, several improvements to the language implementation and
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tools, some performance improvements, and many additions and
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(backward-compatible) changes to the standard library.
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Please read the [release notes](/doc/go1.2) for all
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the details, as some changes may affect the behavior of existing (buggy) programs.
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What follows is the highlights of the release.
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A new [three-index slice syntax](/doc/go1.2#three_index)
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adds the ability to specify capacity as well as length. This allows the
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programmer to pass a slice value that can only access a limited portion of the
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underlying array, a technique that previously required the use of the unsafe
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package.
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A major new feature of the tool chain is the facility to compute and display
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[test coverage results](/doc/go1.2#cover).
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See the [`go test`](/cmd/go/#hdr-Description_of_testing_flags)
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and [cover tool](https://golang.org/x/tools/cmd/cover)
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documentation for details. Later this week we will publish an article that
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discusses this new feature in detail.
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||||
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Goroutines are now [pre-emptively scheduled](/doc/go1.2#preemption),
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in that the scheduler is invoked occasionally upon entry to a function.
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This can prevent busy goroutines from starving other goroutines on the same
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thread.
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An increase to the default goroutine stack size should improve the
|
||||
performance of some programs. (The old size had a tendency to introduce
|
||||
expensive stack-segment switching in performance-critical sections.)
|
||||
On the other end, new restrictions on
|
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[stack sizes](/doc/go1.2#stack_size) and
|
||||
[the number of operating system threads](/doc/go1.2#thread_limit)
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should prevent misbehaving programs from consuming all the resources of a
|
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machine. (These limits may be adjusted using new functions in the
|
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[`runtime/debug` package](/pkg/runtime/debug).)
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||||
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Finally, among the [many changes to the standard library](/doc/go1.2#library),
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significant changes include
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the new [`encoding` package](/doc/go1.2#encoding),
|
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[indexed arguments](/doc/go1.2#fmt_indexed_arguments) in `Printf` format strings, and
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some [convenient additions](/doc/go1.2#text_template) to the template packages.
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As part of the release, the [Go Playground](/play/) has been
|
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updated to Go 1.2. This also affects services that use the Playground, such as
|
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[the Go Tour](/tour/) and this blog.
|
||||
The update also adds the ability to use threads and the `os`, `net`, and
|
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`unsafe` packages inside the sandbox, making it more like a real Go environment.
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To everyone who helped make this release possible, from the many users who
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submitted bug reports to the 116 (!) contributors who committed more than 1600
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changes to the core: Your help is invaluable to the project. Thank you!
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_This blog post is the first of the_
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[Go Advent Calendar](http://blog.gopheracademy.com/day-01-go-1.2),
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_a series of daily articles presented by the_
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[Gopher Academy](http://gopheracademy.com/) _from December 1 to 25._
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@ -1,80 +1,3 @@
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---
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title: Go 1.2 is released
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date: 2013-12-01
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by:
|
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- Andrew Gerrand
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tags:
|
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- release
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summary: Go 1.2 adds test coverage results, goroutine preemption, and more.
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redirect: /blog/go1.2
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---
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|
||||
|
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We are pleased to announce the release of Go 1.2, the latest stable version of
|
||||
the Go Programming Language.
|
||||
|
||||
Binary distributions may be downloaded from the
|
||||
[usual place](/doc/install) or if you prefer to
|
||||
[compile from source](/doc/install/source) you should use
|
||||
the `release` or `go1.2` tags.
|
||||
|
||||
This new release comes nearly seven months after the release of Go 1.1 in May,
|
||||
a much shorter period than the 14 months between 1.1 and 1.0.
|
||||
We anticipate a comparable interval between future major releases.
|
||||
|
||||
[Go 1.2](/doc/go1.2) includes a couple of minor
|
||||
language changes, several improvements to the language implementation and
|
||||
tools, some performance improvements, and many additions and
|
||||
(backward-compatible) changes to the standard library.
|
||||
|
||||
Please read the [release notes](/doc/go1.2) for all
|
||||
the details, as some changes may affect the behavior of existing (buggy) programs.
|
||||
What follows is the highlights of the release.
|
||||
|
||||
A new [three-index slice syntax](/doc/go1.2#three_index)
|
||||
adds the ability to specify capacity as well as length. This allows the
|
||||
programmer to pass a slice value that can only access a limited portion of the
|
||||
underlying array, a technique that previously required the use of the unsafe
|
||||
package.
|
||||
|
||||
A major new feature of the tool chain is the facility to compute and display
|
||||
[test coverage results](/doc/go1.2#cover).
|
||||
See the [`go test`](/cmd/go/#hdr-Description_of_testing_flags)
|
||||
and [cover tool](https://golang.org/x/tools/cmd/cover)
|
||||
documentation for details. Later this week we will publish an article that
|
||||
discusses this new feature in detail.
|
||||
|
||||
Goroutines are now [pre-emptively scheduled](/doc/go1.2#preemption),
|
||||
in that the scheduler is invoked occasionally upon entry to a function.
|
||||
This can prevent busy goroutines from starving other goroutines on the same
|
||||
thread.
|
||||
|
||||
An increase to the default goroutine stack size should improve the
|
||||
performance of some programs. (The old size had a tendency to introduce
|
||||
expensive stack-segment switching in performance-critical sections.)
|
||||
On the other end, new restrictions on
|
||||
[stack sizes](/doc/go1.2#stack_size) and
|
||||
[the number of operating system threads](/doc/go1.2#thread_limit)
|
||||
should prevent misbehaving programs from consuming all the resources of a
|
||||
machine. (These limits may be adjusted using new functions in the
|
||||
[`runtime/debug` package](/pkg/runtime/debug).)
|
||||
|
||||
Finally, among the [many changes to the standard library](/doc/go1.2#library),
|
||||
significant changes include
|
||||
the new [`encoding` package](/doc/go1.2#encoding),
|
||||
[indexed arguments](/doc/go1.2#fmt_indexed_arguments) in `Printf` format strings, and
|
||||
some [convenient additions](/doc/go1.2#text_template) to the template packages.
|
||||
|
||||
As part of the release, the [Go Playground](/play/) has been
|
||||
updated to Go 1.2. This also affects services that use the Playground, such as
|
||||
[the Go Tour](/tour/) and this blog.
|
||||
The update also adds the ability to use threads and the `os`, `net`, and
|
||||
`unsafe` packages inside the sandbox, making it more like a real Go environment.
|
||||
|
||||
To everyone who helped make this release possible, from the many users who
|
||||
submitted bug reports to the 116 (!) contributors who committed more than 1600
|
||||
changes to the core: Your help is invaluable to the project. Thank you!
|
||||
|
||||
_This blog post is the first of the_
|
||||
[Go Advent Calendar](http://blog.gopheracademy.com/day-01-go-1.2),
|
||||
_a series of daily articles presented by the_
|
||||
[Gopher Academy](http://gopheracademy.com/) _from December 1 to 25._
|
||||
|
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