将对象作为参数传递时，它们是通过引用传递的吗? [英] When passing objects as parameters, are they passed by reference?

问题描述

如果我执行以下任一操作，是否对性能有任何影响:

Is there any performance implications if I do either of these:

def do_something(user, article)
...
end

对比

def do_something(user_id, article_id)
  ..
end

我更喜欢传递对象，因为我可能需要其他属性.

I prefer passing objects as I might need other attributes down the road.

推荐答案

是

两个方法调用将花费大致相同的时间.

Yes

Both method calls will take about the same amount of time.

(了解性能后果并且您提出了一个合理的问题是件好事，但即便如此，关于早期优化的标准免责声明¹在技术上仍然适用.)

(It's good to be aware of performance consequences and you asked a reasonable question, but even so, the standard disclaimer¹ about early optimization technically applies.)

^{1.首先，使程序工作.然后，简介.最后，也许，优化.
Donald Knuth 说:我们应该忘记小效率，说大约 97%时间:过早的优化是万恶之源.}

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