Which C++ signals/slots library should I choose?

Question

I want to use a signals/slots library in a project that doesn\'t use QT. I have pretty basic requirements:

1. Connect two functions with any number of parameters

Answer 1

Very, very fast event library on Gamedev.net forms

When profiling some code I'd been working on recently, I was surprised and dismayed to see boost::signals functions floating to the top. For those of you who are unaware, boost::signals is a wonderfully useful signal/slot library which can be used alongside boost::bind for delegate-based event handling such as one sees in C#. It is robust, featureful, and flexible. It is also, I have learned, incredibly, terrifyingly slow. For a lot of people who use boost::signals this is fine because they call events very seldom. I was calling several events per frame per object, with predictable results.

So I wrote my own. Slightly less flexible and featureful. It's optimized for how everyone tends to actually use events. And event invocation is fifteen to eighty times faster than boost::signals.

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