Multithreaded (Intel TBB) version of par2cmdline (archive.org link):<p><a href="http:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20150607135928&#x2F;http:&#x2F;&#x2F;chuchusoft.com&#x2F;par2_tbb&#x2F;index.html" rel="nofollow">http:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20150607135928&#x2F;http:&#x2F;&#x2F;chuchusoft....</a><p>(Apologies for not directly answering the question.)