Index: doc/Announce2.2.0
===================================================================
diff -u -N -r4d4baa54e5477d3e923701d7913d8ec663697de8 -r72a5cb64c9f61d674b447b62fdd16891ec3b48d0
--- doc/Announce2.2.0	(.../Announce2.2.0)	(revision 4d4baa54e5477d3e923701d7913d8ec663697de8)
+++ doc/Announce2.2.0	(.../Announce2.2.0)	(revision 72a5cb64c9f61d674b447b62fdd16891ec3b48d0)
@@ -17,17 +17,27 @@
 
 - NSF:
 
-  * NsfHasTclSpace
+  * Robustness improvements:
+    + NsfHasTclSpace: ...
+    + substdefault for properties and variables: make behaviour of
+    per-object and per-class substdefaults consistent, early check for
+    complete substitution scripts, ...
+  * Performance improvements:
+    + The lookup for (bytecode-compiled) object variables is now
+    supported by a lookup cache to avoid repeated linear searches.
+    + The number of string comparisons (strcmp) was reduced
+    systematically, in method-parameter parsing and method-parameter
+    handling.
 
-
 - NX:
 
   * Improvements to incremental property methods: value=add and
     value=delete
 
   * Improvements to ensemble methods:
     + Fix ensemble-method dispatch via colon dispatcher
-    + [current nextmethod] + [current isnextcall]
+    + [current nextmethod] + [current isnextcall] are now fully aware
+    of ensemble methods, when being used from within.
 
   * Documentation (API and examples):
 
@@ -51,6 +61,8 @@
 
 - Documentation:
 
+  * NSF now has support for TIP #59 introspection via
+    ::nsf::pkgconfig; see https://core.tcl.tk/tips/doc/trunk/tip/59.md
   * Added tutorials on NX properties: tutorial-properties.tcl
   * Improved spelling: next-migration.txt, ...
   
@@ -70,6 +82,7 @@
     structs, esp. on 64-bit machines.
     + Bug fix: Avoid preemptive frees on %proc subsitution for
     forwarder methods.
+    + Aliases: Avoid Tcl_obj re-creations
 
   * New configure option: "--enable-development=test"