doc/go1.20: mention build speed improvements

For #49569.
For #54202.

Change-Id: Iac45338bc4e45617e8ac7425076cf4cd0af157a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/461957
TryBot-Bypass: Austin Clements <austin@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

diff --git a/doc/go1.20.html b/doc/go1.20.html
index 23fa82c41b3b392c9cecacaa691757fe6a1a2dc6..a497f87712a4a84999e53a1262d8a851a3bd8e50 100644 (file)
--- a/doc/go1.20.html
+++ b/doc/go1.20.html
@@ -350,8 +350,10 @@ Do not send CLs removing the interior tags from such phrases.
 </p>
 
 <p><!-- https://go.dev/issue/49569 -->
-  Relative to Go 1.19, generated code performance is generally slightly improved,
-  build wall times are slightly increased, build user times are slightly decreased.
+  Go 1.18 and 1.19 saw regressions in build speed, largely due to the addition
+  of support for generics and follow-on work. Go 1.20 improves build speeds by
+  up to 10%, bringing it back in line with Go 1.17.
+  Relative to Go 1.19, generated code performance is also generally slightly improved.
 </p>
 
 <h2 id="linker">Linker</h2>