From: Than McIntosh <thanm@google.com>
Date: Wed, 13 Dec 2023 16:37:46 +0000 (-0500)
Subject: doc: add release note fragment on inlining changes
X-Git-Tag: go1.22rc1~15
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=d1a186d7d07034b75f1d3fe950804efec3b9089a;p=gostls13.git

doc: add release note fragment on inlining changes

Add some material to the "compiler" portion of the release
notes describing the 1.22 changes to the inliner.

For #61422.
Updates #61502.

Change-Id: Ic7f1cb7f70752446d2465ea3da6bd7488436342b
Reviewed-on: https://go-review.googlesource.com/c/go/+/549395
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
---

diff --git a/doc/go1.22.html b/doc/go1.22.html
index 1ac0e7e6ee..c4337f1fe7 100644
--- a/doc/go1.22.html
+++ b/doc/go1.22.html
@@ -219,6 +219,18 @@ defer func() {
   14% improvement from enabling PGO.
 </p>
 
+<p><!-- https://go.dev/cl/528321 -->
+  The compiler now interleaves devirtualization and inlining, so interface
+  method calls are better optimized.
+</p>
+
+<p><!-- https://go.dev/issue/61502 -->
+  Go 1.22 also includes a preview of an enhanced implementation of the compiler's inlining phase that uses heuristics to boost inlinability at call sites deemed "important" (for example, in loops) and discourage inlining at call sites deemed "unimportant" (for example, on panic paths).
+  Building with <code>GOEXPERIMENT=newinliner</code> enables the new call-site
+  heuristics; see <a href="https://go.dev/issue/61502">issue #61502</a> for
+  more info and to provide feedback.
+</p>
+
 <h2 id="linker">Linker</h2>
 
 <p><!-- CL 493136 -->