1 files changed, 7 insertions, 0 deletions
diff --git a/activerecord/examples/performance.rb b/activerecord/examples/performance.rb
index 63822731d5..22f867d783 100644
--- a/activerecord/examples/performance.rb
+++ b/activerecord/examples/performance.rb
@@ -73,9 +73,16 @@ puts 'Inserting 10,000 users and exhibits...'
   )
 end
 
+ActiveRecord::IdentityMap.enabled = true unless ENV['IM'] == "disabled"
+
+def clear_identity_map!
+  ActiveRecord::IdentityMap.clear
+end
+
 require 'benchmark'
 
 Benchmark.bm(46) do |x|
+  clear_identity_map!
   ar_obj       = Exhibit.find(1)
   attrs        = { :name => 'sam' }
   attrs_first  = { :name => 'sam' }