--- a/relnotes/next Sat May 30 11:36:30 2020 -0400
+++ b/relnotes/next Sat May 30 12:36:00 2020 -0400
@@ -3,6 +3,12 @@
== New Experimental Features ==
+ * The core of some hg operations have been (and are being)
+ implemented in rust, for speed. `hg status` on a repository with
+ 300k tracked files goes from 1.8s to 0.6s for instance.
+ This has currently been tested only on linux, and does not build on
+ windows. See rust/README.rst in the mercurial repository for
+ instructions to opt into this.
== Backwards Compatibility Changes ==