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doc/go1.21: run relnotes again
Fill in some of the simpler entries, leave some more TODO entries. For #58645 Change-Id: I20eb09ba709520ab27301c568d777184a405ffdc Reviewed-on: https://go-review.googlesource.com/c/go/+/501695 TryBot-Bypass: Ian Lance Taylor <iant@google.com> Reviewed-by: Eli Bendersky <eliben@google.com> Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
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‎doc/go1.21.html

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@@ -31,7 +31,7 @@ <h2 id="introduction">DRAFT RELEASE NOTES — Introduction to Go 1.21</h2>
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We expect almost all Go programs to continue to compile and run as before.
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</p>
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<p>
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<p><!-- https://go.dev/issue/57631 -->
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Go 1.21 introduces a small change to the numbering of releases.
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In the past, we used Go 1.<i>N</i> to refer to both the overall Go language version and release family
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as well as the first release in that family.
@@ -368,7 +368,11 @@ <h3 id="slogtest">New testing/slogtest package</h3>
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<h3 id="slices">New slices package</h3>
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<p><!-- https://go.dev/issue/45955, https://go.dev/issue/54768, https://go.dev/issue/57348, https://go.dev/issue/57433, CL 467417, CL 483175 -->
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<p>
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<!-- https://go.dev/issue/45955, https://go.dev/issue/54768 -->
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<!-- https://go.dev/issue/57348, https://go.dev/issue/57433 -->
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<!-- https://go.dev/issue/58565, https://go.dev/issue/60091 -->
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<!-- CL 467417, CL 468855, CL 483175, CL 496078, CL 498175 -->
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The new <a href="/pkg/slices">slices</a> package provides many common
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operations on slices, using generic functions that work with slices
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of any element type.
@@ -382,6 +386,14 @@ <h3 id="maps">New maps package</h3>
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maps of any key or element type.
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</p>
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<dl id="cmp"><dt><a href="/pkg/cmp/">cmp</a></dt>
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<dd>
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<p><!-- CL 496356 -->
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TODO: <a href="https://go.dev/cl/496356">https://go.dev/cl/496356</a>: cmp: new package; modified api/next/59488.txt
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</p>
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</dd>
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</dl><!-- cmp -->
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<h3 id="minor_library_changes">Minor changes to the library</h3>
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<p>
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</dd>
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</dl><!-- crypto/rsa -->
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<!-- CL 483815 reverted -->
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<dl id="crypto/sha256"><dt><a href="/pkg/crypto/sha256/">crypto/sha256</a></dt>
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<dd>
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<p><!-- https://go.dev/issue/50543, CL 408795 -->
@@ -493,6 +507,53 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
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</dd>
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</dl><!-- crypto/sha256 -->
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<!-- CL 481478 reverted -->
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<!-- CL 483816 reverted -->
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<dl id="crypto/tls"><dt><a href="/pkg/crypto/tls/">crypto/tls</a></dt>
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<dd>
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<p><!-- https://go.dev/issue/46308 -->
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TODO: <a href="https://go.dev/issue/46308">https://go.dev/issue/46308</a>: add VersionName function to return a string version of the TLS Version
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</p>
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<p><!-- https://go.dev/issue/60107 -->
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TODO: <a href="https://go.dev/issue/60107">https://go.dev/issue/60107</a>: QUIC 0-RTT APIs
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</p>
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<p><!-- CL 493655 -->
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TODO: <a href="https://go.dev/cl/493655">https://go.dev/cl/493655</a>: crypto/tls: support QUIC as a transport; modified api/next/44886.txt
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</p>
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<p><!-- CL 496818 -->
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TODO: <a href="https://go.dev/cl/496818">https://go.dev/cl/496818</a>: crypto/tls: add SessionState and use it on the server side; modified api/next/60105.txt
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</p>
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<p><!-- CL 496820 -->
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TODO: <a href="https://go.dev/cl/496820">https://go.dev/cl/496820</a>: crypto/tls: add ClientSessionState.ResumptionState and NewResumptionState; modified api/next/60105.txt
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</p>
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<p><!-- CL 496821 -->
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TODO: <a href="https://go.dev/cl/496821">https://go.dev/cl/496821</a>: crypto/tls: add WrapSession and UnwrapSession; modified api/next/60105.txt
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</p>
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<p><!-- CL 496822 -->
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TODO: <a href="https://go.dev/cl/496822">https://go.dev/cl/496822</a>: crypto/tls: add SessionState.Extra; modified api/next/60105.txt
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</p>
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<p><!-- CL 496995 -->
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TODO: <a href="https://go.dev/cl/496995">https://go.dev/cl/496995</a>: crypto/tls: add QUIC 0-RTT APIs; modified api/next/44886.txt, api/next/60107.txt
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</p>
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<p><!-- CL 497376 -->
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TODO: <a href="https://go.dev/cl/497376">https://go.dev/cl/497376</a>: crypto/tls: implement Extended Master Secret; modified api/except.txt
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</p>
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<p><!-- CL 497377 -->
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TODO: <a href="https://go.dev/cl/497377">https://go.dev/cl/497377</a>: crypto/tls: add VersionName; modified api/next/46308.txt
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</p>
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</dd>
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</dl><!-- crypto/tls -->
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<dl id="crypto/x509"><dt><a href="/pkg/crypto/x509/">crypto/x509</a></dt>
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<dd>
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<p><!-- https://go.dev/issue/53573, CL 468875 -->
@@ -521,6 +582,11 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
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The package now defines the constant
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<a href="/pkg/debug/elf/#COMPRESS_ZSTD"><code>COMPRESS_ZSTD</code></a>.
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</p>
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<p><!-- https://go.dev/issue/60348, CL 496918 -->
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The package now defines the constant
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<a href="/pkg/debug/elf/#R_PPC64_REL24_P9NOTOC"><code>R_PPC64_REL24_P9NOTOC</code></a>.
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</p>
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</dd>
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</dl><!-- debug/elf -->
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@@ -665,6 +731,18 @@ <h3 id="minor_library_changes">Minor changes to the library</h3>
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</dd>
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</dl><!-- hash/maphash -->
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<dl id="html/template"><dt><a href="/pkg/html/template/">html/template</a></dt>
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<dd>
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<p><!-- https://go.dev/issue/59584 -->
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TODO: <a href="https://go.dev/issue/59584">https://go.dev/issue/59584</a>: expose ErrJSTemplate
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</p>
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<p><!-- CL 496395 -->
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TODO: <a href="https://go.dev/cl/496395">https://go.dev/cl/496395</a>: html/template: expose ErrJSTemplate; modified api/next/59584.txt
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</p>
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</dd>
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</dl><!-- html/template -->
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<dl id="io/fs"><dt><a href="/pkg/io/fs/">io/fs</a></dt>
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<dd>
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<p><!-- https://go.dev/issue/54451, CL 489555 -->
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</dd>
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</dl><!-- io/fs -->
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<!-- https://go.dev/issue/56491 rolled back -->
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<!-- CL 459435 reverted -->
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<!-- CL 467515 reverted -->
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<!-- https://go.dev/issue/56491 rolled back by https://go.dev/issue/60519 -->
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<!-- CL 459435 reverted by CL 467255 -->
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<!-- CL 467515 reverted by CL 499416 -->
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<dl id="math/big"><dt><a href="/pkg/math/big/">math/big</a></dt>
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<dd>
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<p><!-- https://go.dev/issue/56984, CL 453115 -->
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<p><!-- https://go.dev/issue/56984, CL 453115, CL 500116 -->
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The new <a href="/pkg/math/big/#Int.Float64"><code>Int.Float64</code></a>
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method returns the nearest floating-point value to a
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multi-precision integer, along with an indication of any
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always returning an error.
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</p>
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<p><!-- CL 495079 -->
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TODO: <a href="https://go.dev/cl/495079">https://go.dev/cl/495079</a>: os: if descriptor is non-blocking, retain that in Fd method
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</p>
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<p><!-- CL 477215 -->
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On Windows calling
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<a href="/pkg/os/#Truncate"><code>Truncate</code></a> on a
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<code>GODEBUG=cgocheck=1</code> is still available (and is still the default).
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</p>
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<p><!-- https://go.dev/issue/46787 -->
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<p><!-- https://go.dev/issue/46787, CL 367296 -->
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A new type <code>Pinner</code> has been added to the runtime
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package. <code>Pinner</code>s may be used to "pin" Go memory
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such that it may be used more freely by non-Go code. For instance,
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See <a href="/pkg/runtime#Pinner">the docs</a> for more details.
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</p>
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<p><!-- CL 472195 -->
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TODO: <a href="https://go.dev/cl/472195">https://go.dev/cl/472195</a>: runtime: remove NOFRAME from asmcgocall, systemstack and mcall
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</p>
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</dd>
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</dl><!-- runtime -->
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<dl id="runtime/metrics"><dt><a href="/pkg/runtime/metrics/">runtime/metrics</a></dt>
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<dd>
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<p><!-- https://go.dev/issue/56857, CL 497315 -->
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A few previously-internal GC metrics, such as live heap size, are
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now available.
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<code>GOGC</code> and <code>GOMEMLIMIT</code> are also now
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available as metrics.
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</p>
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</dd>
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</dl><!-- runtime/metrics -->
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<dl id="runtime/trace"><dt><a href="/pkg/runtime/trace/">runtime/trace</a></dt>
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<dd>
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<p><!-- https://go.dev/issue/16638 -->
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</dd>
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</dl><!-- runtime/trace -->
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<dl id="runtime/metrics"><dt><a href="/pkg/runtime/metrics/">runtime/metrics</a></dt>
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<dd>
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<p><!-- https://go.dev/issue/56857 -->
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A few previously-internal GC metrics, such as live heap size, are
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now available.
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<code>GOGC</code> and <code>GOMEMLIMIT</code> are also now
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available as metrics.
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</p>
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</dd>
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</dl><!-- runtime/metrics -->
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<dl id="sync"><dt><a href="/pkg/sync/">sync</a></dt>
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<dd>
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<p><!-- https://go.dev/issue/56102, CL 451356 -->
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<h3 id="darwin">Darwin</h3>
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<p><!-- go.dev/issue/57125 -->
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<p><!-- https://go.dev/issue/57125 -->
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As <a href="go1.20#darwin">announced</a> in the Go 1.20 release notes,
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Go 1.21 requires macOS 10.15 Catalina or later;
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support for previous versions has been discontinued.
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</p>
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<h3 id="windows">Windows</h3>
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<p><!-- go.dev/issue/57003, go.dev/issue/57004 -->
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<p><!-- https://go.dev/issue/57003, https://go.dev/issue/57004 -->
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As <a href="go1.20#windows">announced</a> in the Go 1.20 release notes,
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Go 1.21 requires at least Windows 10 or Windows Server 2016;
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support for previous versions has been discontinued.
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<!-- https://go.dev/issue/54232 -->
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<!-- https://go.dev/issue/57906 -->
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<!-- https://go.dev/issue/58668 -->
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<!-- https://go.dev/issue/59676 -->
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<!-- changes to cmd/api that don't need release notes. -->
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<!-- CL 469115, CL 469135, CL 499981 -->
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<!-- proposals that don't need release enotes. -->
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<!-- https://go.dev/issue/10275 -->
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<!-- https://go.dev/issue/59719 -->

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