diff --git a/site/src/site/releasenotes/groovy-4.0.adoc b/site/src/site/releasenotes/groovy-4.0.adoc
index dc5755d..703e3a5 100644
--- a/site/src/site/releasenotes/groovy-4.0.adoc
+++ b/site/src/site/releasenotes/groovy-4.0.adoc
@@ -37,6 +37,17 @@
 [[Groovy4.0other]]
 == Other improvements
 
+=== GString performance improvements
+
+* GString internals were revamped to improve performance.
+In numerous cases, GString data structures are automatically cached.
+While rarely used, GStrings do permit their internal data structures to
+be viewed (and even changed!). In such circumstances, caching is disabled.
+If you wish to view and not change the internal data structures, you can
+call a `freeze()` method in `GStringImpl` to disallow changing of the internal
+data structures which allows caching to remain active.
+link:https://issues.apache.org/jira/browse/GROOVY-9637[GROOVY-9637]
+
 === JavaShell (incubating)
 
 A Java equivalent of GroovyShell, allowing to more easily work with snippets of Java code.
@@ -54,7 +65,7 @@
 * Module definitions written in Groovy
 * Support for records
 
-== Potential breaking changes
+== Other breaking changes
 
 * Numerous classes previously "leaked" ASM constants which are essentially an internal implementation detail by virtue of
 implementing an `Opcodes` interface. This will not normally affect the majority of
@@ -62,7 +73,23 @@
 Before compiling with Groovy 4, some of these may need one or more appropriate static import statements added.
 AST transforms which extend `AbstractASTTransformation` are one example of potentially affected classes.
 (link:https://issues.apache.org/jira/browse/GROOVY-9736[GROOVY-9736]).
-
+* `ASTTest` previously had `RUNTIME` retention but now has `SOURCE` retention.
+We know of no users making use of the old retention but are aware of various
+issues keeping the old value.
+link:https://issues.apache.org/jira/browse/GROOVY-9702[GROOVY-9702]
+* There were some inconsistencies with JavaBean property naming conventions
+for various edge cases, e.g. for a field with a name being a single uppercase `X` and having a `getX` accessor,
+then the field was given priority over the accessor.
+link:https://issues.apache.org/jira/browse/GROOVY-9618[GROOVY-9618]
+* Numerous mostly internal data structure classes, e.g. AbstractConcurrentMapBase, AbstractConcurrentMap, ManagedConcurrentMap
+were deprecated and their usage replaced with better alternatives.
+This should be mostly invisible but some changes might impact users using
+internal Groovy classes directly.
+link:https://issues.apache.org/jira/browse/GROOVY-9631[GROOVY-9631]
+* We bumped our Picocli version. This resulted in minor formatting changes
+of some CLI help messages. We recommend not relying on the exact format of such messages.
+link:https://issues.apache.org/jira/browse/GROOVY-9627[GROOVY-9627]
+>>>>>>> c9e657d... fix typo
 
 == JDK requirements