Avoid calls to require in hotspots

Followup: ruby#686 This single call shows up as 4% of some controller actions in the lobsters benchmark. Profile: https://share.firefox.dev/3EqKnhS
byroot · Jan 30, 2025 · b77bfee · b77bfee
1 parent 5605134
commit b77bfee
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/psych/nodes/node.rb b/lib/psych/nodes/node.rb
@@ -55,7 +55,8 @@ def to_ruby(symbolize_names: false, freeze: false, strict_integer: false)
       #
       # See also Psych::Visitors::Emitter
       def yaml io = nil, options = {}
-        require "stringio"
+        require "stringio" unless defined?(StringIO)
+
         real_io = io || StringIO.new(''.encode('utf-8'))
 
         Visitors::Emitter.new(real_io, options).accept self