> Another question , which Stephane noted already, is the overhead of
> broadcasting.

First of all, announcements are magnitudes faster than the ancient
change-update and trigger frameworks.

The problem of broadcasting does not apply to announcements, because
the observer only registers and receives events he is interested in.

Please read the blog posts of Vassily.

Lukas

-- 
Lukas Renggli
http://www.lukas-renggli.ch

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