Venturing a guess:<br>  <br>  - wanted to run on as many platforms as possible and not have to deal with variations in C++ STL versions and implementations<br>  - wanted smallest possible footprint - some STL implementations produce titantic&nbsp; footprints<br>  <br>  I haven't looked under the hood but what appears an ugly engine to you runs bloody fast.<br>  <br>  Cheers,<br>  Mark<br><br><b><i>goodmenzy &lt;goodmenzy@gmail.com&gt;</i></b> wrote:<blockquote class="replbq" style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;">  I'm studying jam source code.<br>Why not develop jam in C++ ?<br>He Sepend many time to implement Hash List ,<br>But all of this was in STL.<br>And many data was stored in char * dymanically.<br>If use C++ , the things seems to be simply.<br><br><br><br>_______________________________________________<br>Unsubscribe &amp; other changes: http://lists.boost.org/mailman/listinfo.cgi/boost-build<br></blockquote><br>