AR serialize or deserialize

benchmark for AR serializedeserialize.rb

require 'benchmark'

def serialize(record)
  [record.class.name, record.instance_variable_get(:@attributes)]
end

def deserialize(serialized)
  record = serialized[0].constantize.allocate
  record.init_with('attributes' => serialized[1])
  record
end

# 通过Rails.cache自带的方法来实现序列化/反序列化AR对象
def native_deserialize(record)
  record.clear_association_cache
  Rails.cache.write :native, record
  Rails.cache.read :native
end

# 通过数组存储类名，和属性来实现序列化/反序列化AR对象
def array_deserialize(record)
  Rails.cache.write :array, serialize(record)
  deserialize(Rails.cache.read :array)
end


def run_bm(user)
  Benchmark.bm(20) do |x|
    x.report("array:")  {5000.times{array_deserialize(user) }}
    x.report("native:") {5000.times{native_deserialize(user) }}
  end
end

user = User.first
run_bm(user)


-------------------------------------------------------------------
                           user     system      total        real
array:                 2.760000   0.270000   3.030000 (  3.050988)
native:                3.580000   0.250000   3.830000 (  3.834514)
-------------------------------------------------------------------