Update CHANGES.rst

CHANGES.rst

@@ -12,6 +12,35 @@ SLASH/ Changes
 This document contains a log of noteworthy changes to SLASH/ from new
 to old.
 
+Version 1.0.0-rc3 (NEXT RELEASE)
+--------------------------------
+
+fellow
+======
+
+.. _#60: https://gitlab.com/uplex/varnish/slash/-/issues/60
+
+* Reduce memory cache usage when adding objects to the cache with
+  unknown size because of chunked encoding (`#60`_).
+
+Version 1.0.0-rc2
+-----------------
+
+fellow
+======
+
+.. _`detailed performance report`: doc/perf/dev-03.rst
+
+* Add a `detailed performance report`_.
+
+* Fix a regression triggering a panic if objects are deleted while
+  storage is being loaded
+
+.. _#57: https://gitlab.com/uplex/varnish/slash/-/issues/57
+
+* Avoid excessive stack usage caused by ``-fno-early-inlining`` with
+  gcc, as is default on Ubuntu (`#57`_).
+
 Version 1.0.0-rc1
 -----------------