https://svn.boost.org/trac10/ticket/11663 <p> the function .extension() returns an fs::path, containing a fresh string that contains the extension. On certain library implementations that don't implement the SSO -- or, I guess, for files with very long extensions -- there will be a memory allocation each time the function is called. </p> <p> That means that for solutions implementing search-by-extension such as is written in: </p> <p> <a class="ext-link" href="http://stackoverflow.com/questions/11140483/how-to-get-list-of-files-with-a-specific-extension-in-a-given-folder"><span class="icon">​</span>http://stackoverflow.com/questions/11140483/how-to-get-list-of-files-with-a-specific-extension-in-a-given-folder</a> </p> <p> there could be hundreds of memory allocations for just iterating a directory structure. IMO, there really shouldn't be. </p> <p> I propose adding the function bool path::has_extension(string const&amp;) which can compare the extension in a memory-friendly way. </p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/11663 Trac 1.4.3 Beman Dawes Sun, 04 Oct 2015 12:05:13 GMT https://svn.boost.org/trac10/ticket/11663#comment:1 https://svn.boost.org/trac10/ticket/11663#comment:1 <ul> <li><strong>status</strong> <span class="trac-field-old">new</span> → <span class="trac-field-new">assigned</span> </li> </ul> <p> The broader problem is that neither Boost.Filesystem nor the C++ Filesystem Library TS supports globbing. See <a class="ext-link" href="https://en.wikipedia.org/wiki/Glob_%28programming%29"><span class="icon">​</span>https://en.wikipedia.org/wiki/Glob_%28programming%29</a> </p> <p> So rather than tackling your suggested change, I'll take a look the more general glob match problem. </p> <p> Thanks, </p> <p> --Beman </p> Ticket daniel.kruegler@… Fri, 09 Sep 2016 18:14:22 GMT