gistfile1.txt

>> require 'active_record'
=> true
>> ActiveRecord::Base.establish_connection(
?>       :adapter => "sqlite3",
?>       :database  => "benchmark.db"
>>   )
>> ActiveRecord::Base.connection.execute("DROP TABLE IF EXISTS active_record_models")
>> ActiveRecord::Base.connection.execute("CREATE TABLE active_record_models (id INTEGER UNIQUE, title STRING, text STRING)")
>> class ActiveRecordModel < ActiveRecord::Base
>>   end
>> ActiveRecordModel.new
>> require 'benchmark'

# 3.0.7

>> Benchmark.measure { 100_000.times { ActiveRecordModel.new } }
=>   1.470000   0.000000   1.470000   1.474953

# 3.1.0.rc4

>> Benchmark.measure { 100_000.times { ActiveRecordModel.new } }
=>   7.910000   0.050000   7.960000   7.951169

>> Benchmark.measure { 100_000.times { ActiveRecordModel.new(:title => "foo", :text => "bar") } }
=>  15.380000   0.010000  15.390000  15.381160