C++: Put tostring-performance note in 1.22 file

jbj · jbj · commit 9830c6989222 · 2019-06-04T20:47:29.000-07:00
diff --git a/change-notes/1.22/analysis-cpp.md b/change-notes/1.22/analysis-cpp.md
@@ -0,0 +1,17 @@
+# Improvements to C/C++ analysis
+
+## General improvements
+
+## New queries
+
+| **Query**                   | **Tags**  | **Purpose**                                                        |
+|-----------------------------|-----------|--------------------------------------------------------------------|
+
+## Changes to existing queries
+
+| **Query**                  | **Expected impact**    | **Change**                                                       |
+|----------------------------|------------------------|------------------------------------------------------------------|
+
+## Changes to QL libraries
+
+- The predicate `TypeMention.toString()` has been simplified to always return the string "`type mention`".  This may improve performance when using `Element.toString()` or its descendants.
