https://journal.robbi.my/tags/posix/Recent content in Posix on JOURNAL.ROBBI.MYHugoen-usMon, 26 Dec 2022 22:16:21 +0800https://journal.robbi.my/posts/201108111900/Sun, 08 Nov 2020 11:19:00 +0000https://journal.robbi.my/posts/201108111900/<p>I learn some trick today on how to speed up <code>find</code>, <code>exec</code> command. Let check this out:</p> <div class="code-block my-6"> <div class="code-header font-mono"> <span class="code-lang"> <svg class="inline size-[1em] me-1 align-text-bottom" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M12 .297c-6.63 0-12 5.373-12 12 0 5.303 3.438 9.8 8.205 11.385.6.113.82-.258.82-.577 0-.285-.01-1.04-.015-2.04-3.338.724-4.042-1.61-4.042-1.61C4.422 18.07 3.633 17.7 3.633 17.7c-1.087-.744.084-.729.084-.729 1.205.084 1.838 1.236 1.838 1.236 1.07 1.835 2.809 1.305 3.495.998.108-.776.417-1.305.76-1.605-2.665-.3-5.466-1.332-5.466-5.93 0-1.31.465-2.38 1.235-3.22-.135-.303-.54-1.523.105-3.176 0 0 1.005-.322 3.3 1.23.96-.267 1.98-.399 3-.405 1.02.006 2.04.138 3 .405 2.28-1.552 3.285-1.23 3.285-1.23.645 1.653.24 2.873.12 3.176.765.84 1.23 1.91 1.23 3.22 0 4.61-2.805 5.625-5.475 5.92.42.36.81 1.096.81 2.22 0 1.606-.015 2.896-.015 3.286 0 .315.21.69.825.57C20.565 22.092 24 17.592 24 12.297c0-6.627-5.373-12-12-12"/></svg> gist · RobbiNespu </span> <a href="https://gist.github.com/RobbiNespu/aa81b691956d4283912e65762a69e094" target="_blank" rel="noopener" class="code-copy">View on GitHub ↗</a> </div> <div class="code-content"> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#282a36;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-text" data-lang="text"><span style="display:flex;"><span># let see how many files we have </span></span><span style="display:flex;"><span>$ find . -type f | wc -l </span></span><span style="display:flex;"><span>36367 </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span># lets check every file status </span></span><span style="display:flex;"><span>$ time find . -type f -exec stat {} \; &gt; /dev/null </span></span><span style="display:flex;"><span>real 0m40.107s </span></span><span style="display:flex;"><span>user 0m14.381s </span></span><span style="display:flex;"><span>sys 0m26.410s </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span># lets check every file status </span></span><span style="display:flex;"><span>$ time find . -type f -exec stat {} + &gt; /dev/null </span></span><span style="display:flex;"><span>real 0m1.281s </span></span><span style="display:flex;"><span>user 0m0.626s </span></span><span style="display:flex;"><span>sys 0m0.656s</span></span></code></pre></div> </div> </div> <p>Wow that’s quite a huge difference! Impressive! All we did was swap the <code>\;</code> for a <code>+</code>.</p>