[EXPERIMENTAL] Make NilClass#to_s, TrueClass#to_s and FalseClass#to_s return a frozen String

    * Always the same frozen String for each of these values.
    * Avoids extra allocations whenever calling these 3 methods.
    * See [Feature #16150]

1 files changed, 8 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 1ef70fcb50..2f8b954c57 100644
--- a/NEWS
+++ b/NEWS
@@ -163,6 +163,14 @@ Integer::
          0b01001100[2...6] #=> 0b0011
              ^^^^
 
+NilClass / TrueClass / FalseClass::
+
+  Modified method::
+
+    * NilClass#to_s, TrueClass#to_s and FalseClass#to_s now always returns a
+      frozen String. The returned String is always the same for each of these
+      values. This change is experimental. [Feature #16150]
+
 Module::
 
   New method::