+ * The code path to write out the packed-refs file has been optimized,
+ which especially matters in a repository with a large number of
+ refs.
+
+ * The check to see if a ref $F can be created by making sure no
+ existing ref has $F/ as its prefix has been optimized, which
+ especially matters in a repository with a large number of existing
+ refs.
+
+ * "git fsck" was taught to check contents of tag objects a bit more.
+
+ * "git hash-object" was taught a "--literally" option to help
+ debugging.
+