These errors nearly always indicate sloppy programming. So if it's your code, you should clean them up anyway.
这些错误几乎总是表明编程草率。所以如果是您的代码,无论如何都应该清除这些错误。
Does it really matter to you whether your code is going to take 300 years or 900 years to run?
或者900年区别大么?,这个数字的规模才是问题关键所在?
But the things we were trying to stress were that it's an important design decision when you are coming up with a piece of code, as to what kind of efficiency your code has.
但是我们这里要强调的是,当你写代码的时候,决定你的代码的效率的很重要的事情,就是你的设计决定。
The only thing that compiler needs to know is kind of what pattern to look for in the rest of your code.
编译器需要知道的唯一的东西是,用来在剩下的代码中寻找的函数形式。
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