I haven&#39;t taken a look at the patch but I don&#39;t really know how it can be possible to speed things up without invoking UB (I will take a look at it today).<div><br></div><div>The obvious way to get the same performance as C is just to use a boost::container::vector instead of std::vector. Std::vector is safer but it is just not designed to support this use case &quot;as efficient as possible&quot; (it should still be pretty fast tho).</div><div><br>On Monday, August 10, 2015, Utkarsh Bhardwaj &lt;<a href="mailto:hap_tork@hotmail.com">hap_tork@hotmail.com</a>&gt; wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Has this been incorporated in the newer versions of boost.mpi library (1.5+)?<br>
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</blockquote></div><br><br>-- <br><div dir="ltr">Dipl.-Ing. Gonzalo Brito Gadeschi<br>Institute of Aerodynamics and Chair of Fluid Mechanics<br>RWTH Aachen University<br>Wuellnerstraße 5a<br>D-52062 Aachen<br>Germany<br>Phone: ++49-(0)241-80-94821<br>Fax: ++49-(0)241-80-92257<br>E-mail:  <a href="mailto:g.brito@aia.rwth-aachen.de" target="_blank">g.brito@aia.rwth-aachen.de</a><br>Internet: <a href="http://www.aia.rwth-aachen.de" target="_blank">www.aia.rwth-aachen.de</a></div><br>