[Boost-users] [boost-users] [bind][function] - too many copies

Subject: [Boost-users] [boost-users] [bind][function] - too many copies
From: Lorimer, Stephen (stephen.lorimer_at_[hidden])
Date: 2010-10-07 10:53:15

For a given member function of the form void foo::f0(), passing this to
boost bind results in the class instance being copied 7 times.

 

Storing the result of bind in boost function incurs another 11 copies

 

(code and results are here: http://boost.codepad.org/6jBmoKuj)

 

Using tr1::bind and function has slightly better results, but still not
ideal: Doing just tr1::bind results in the class instance being copied 4
times.

 

Storing the result of bind in tr1 function incurs another 3 copies

 

(code and results are here: http://boost.codepad.org/w1EV6JBY)

 

Am I right in saying this is because boost::bind uses normal templates
while tr1::bind uses variadic templates?

 

Either way this is not very efficient. Is there a way to improve this?

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