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From: Doug Gregor (dgregor_at_[hidden])
Date: 2005-05-10 08:32:30

On May 10, 2005, at 7:11 AM, Keith MacDonald wrote:

> I have an application that implements the Observer pattern, based on
> the GOF
> code and was interested in using Boost.Signals in a new application.
> Before
> committing myself, I decided to check the relative performance when
> signalling two observers. Both tests were performed on Windows XP,
> using
> MSVC 8 beta 2, with the /Ox optimisation. Here are the times for
> 6,000,000
> signals, measured with the Win32 GetTickCount() API on a 3GHz P4 with
> 1GB
> RAM:
> GOF Observer: 109
> Boost.Signals: 6203
> Clearly, you have to trade convenience for performance with this
> library.

The performance of Signals has been drastically improved in 1.33.0
thanks to a patch from Robert Zeh. It may still not be as quick as a
specific implementation of the Observer pattern, but it's much more
reasonable now.


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