Improve perfomance for Integer#size method [Feature #17135] (#3476)

* Improve perfomance for Integer#size method [Feature #17135]

* re-run ci

* Let MJIT frame skip work for Integer#size

Co-authored-by: Takashi Kokubun <[email protected]>

1 files changed, 20 insertions, 0 deletions

diff --git a/numeric.rb b/numeric.rb
index be33c5b436..c892cbe6ef 100644
--- a/numeric.rb
+++ b/numeric.rb
@@ -167,6 +167,26 @@ class Integer
     return self
   end
 
+  #
+  #  Document-method: Integer#size
+  #  call-seq:
+  #     int.size  ->  int
+  #
+  #  Returns the number of bytes in the machine representation of +int+
+  #  (machine dependent).
+  #
+  #     1.size               #=> 8
+  #     -1.size              #=> 8
+  #     2147483647.size      #=> 8
+  #     (256**10 - 1).size   #=> 10
+  #     (256**20 - 1).size   #=> 20
+  #     (256**40 - 1).size   #=> 40
+  #
+  def size
+    Primitive.attr! 'inline'
+    Primitive.cexpr! 'rb_int_size(self)'
+  end
+
   #  call-seq:
   #     int.to_i    ->  integer
   #