Re-implement `Array#_inspect` and `Hash#_inspect` without blocks.

To reduce the env object allocation; ref #4143

1 files changed, 9 insertions, 2 deletions

diff --git a/mrblib/array.rb b/mrblib/array.rb
index ae0868410..53d880660 100644
--- a/mrblib/array.rb
+++ b/mrblib/array.rb
@@ -84,8 +84,15 @@ class Array
   end
 
   def _inspect
-    return "[]" if self.size == 0
-    "["+self.map{|x|x.inspect}.join(", ")+"]"
+    size = self.size
+    return "[]" if size == 0
+    ary=[]
+    i=0
+    while i<size
+      ary<<self[i].inspect
+      i+=1
+    end
+    "["+ary.join(", ")+"]"
   end
   ##
   # Return the contents of this array as a string.