如何提升实现信号和槽？ [英] How does boost implements signals and slots?

问题描述

要继续另一个问题，让问这个：

To continue another question, lets ask this:

如何提升执行的信号/插槽机制？

How does Boost implement the signals/slot mechanism?

请参阅：
<一href=\"http://stackoverflow.com/questions/1406940/how-signal-and-slots-are-implemented-under-the-hood\">http://stackoverflow.com/questions/1406940/how-signal-and-slots-are-implemented-under-the-hood
http://www.boost.org/doc /libs/1%5F40%5F0/doc/html/signals.html

推荐答案

下面是从的这个gamedev.net线程得到讨论滚动

here's an interesting snippet from this gamedev.net thread to get the discussion rolling

原帖由Spoonbender所以，奖金
  问题：是什么原因导致的boost ::信号
  是的是的慢很多？

Original post by Spoonbender So, bonus question: What causes boost::signals to be that much slower?

它看起来像有一对夫妇
  BIGGIES。首先，尽管
  提高::信号不是线程安全的，它
  进入和离开临界区一
  几次。其次，有
  这个命名槽啄这似乎
  结果过于复杂的数据
  这需要很长的时间结构
  遍历。然后还有很多
  从各种镍 - 和 - 迪明
  看家的东西它。最后，
  个别调用具有高得多
  开销，因为升压::绑定的
  runtiminess。它的所有功能
  我敢肯定有人有需要，
  但我不知道。

It looks like there are a couple of biggies. First, despite the fact that boost::signals isn't threadsafe, it enters and leaves critical sections a couple of times. Secondly, there's this named-slots thingy which seems to result in overly complex data structures which take a long time to iterate over. And then there's a lot of nickel-and-diming from various housekeeping things it does. Finally, the individual calls have much higher overhead because of boost::bind's runtiminess. It's all functionality that I'm sure someone has a need for, but I don't.

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