Ruby对象，减少内存使用

Question

class Employee 
    attr_accessor :id, :salary, :birthday... # about 10 more attribures 

    def qualify_for_raise? ..... end 

    def qualify_for_promotion? ..... end 

    # 10 more instance method 
end 

class Review 
    def review(employee_array) 
    employee_array.map do |employee| 
     if employee.qualify_for_raise? 
     # ... 
     end 
     if employee.qualify_for_promotion? 
     # ... 
     end 
     # ... 
    end 
    end 
end 

因为我将创造50000个Employee对象，倒不如采取所有实例方法了Employee类的，因为每个Employee对象将有它自己的实例方法副本？如果这是真的，我设计我的类如下所示，我更喜欢声明方法来操作Employee类本身内的Employee数据。有没有办法找到有/没有实例方法的Employee对象的大小？

class Employee 
    att_accessor :id, :salary, :birthday... # about 10 more attribures 
end 

class Review 
    def review(employee_array) 
    employee_array.map do |employee| 
     if is_qualify_for_raise(employee) 
     # ... 
     end 
     if is_qualify_for_promotion(employee) 
     # ... 
     end 
     # ... 
    end 
    end 

    def is_qualify_for_raise(employee) ..... end 
    def is_qualify_for_promotion(employee) ..... end 
    # 10 more methods 
end 

Answer 1

对象的实例不包含其实例方法的副本，因此对象具有的实例方法的数量不会影响性能。