From e6fa1d62faf6ba4b0f3277e2e92e6e60d4330cc8 Mon Sep 17 00:00:00 2001
From: Alexander Momchilov <alexandermomchilov@gmail.com>
Date: Mon, 18 Dec 2023 04:00:48 -0500
Subject: [PATCH] [ruby/psych] Use `compare_by_identity` instead of `object_id`

Object IDs became more expensive in Ruby 2.7. Using `Hash#compare_by_identity` let's us get the same effect, without needing to force all these objects to have object_ids assigned to them.

https://github.com/ruby/psych/commit/df69e4a12e
---
 ext/psych/lib/psych/visitors/yaml_tree.rb | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/ext/psych/lib/psych/visitors/yaml_tree.rb b/ext/psych/lib/psych/visitors/yaml_tree.rb
index 51491783c3..1dd4094c1d 100644
--- a/ext/psych/lib/psych/visitors/yaml_tree.rb
+++ b/ext/psych/lib/psych/visitors/yaml_tree.rb
@@ -15,30 +15,29 @@ module Psych
     class YAMLTree < Psych::Visitors::Visitor
       class Registrar # :nodoc:
         def initialize
-          @obj_to_id   = {}
-          @obj_to_node = {}
+          @obj_to_id   = {}.compare_by_identity
+          @obj_to_node = {}.compare_by_identity
           @targets     = []
           @counter     = 0
         end
 
         def register target, node
-          return unless target.respond_to? :object_id
           @targets << target
-          @obj_to_node[target.object_id] = node
+          @obj_to_node[target] = node
         end
 
         def key? target
-          @obj_to_node.key? target.object_id
+          @obj_to_node.key? target
         rescue NoMethodError
           false
         end
 
         def id_for target
-          @obj_to_id[target.object_id] ||= (@counter += 1)
+          @obj_to_id[target] ||= (@counter += 1)
         end
 
         def node_for target
-          @obj_to_node[target.object_id]
+          @obj_to_node[target]
         end
       end