https://www.khangnghiem.com/tags/javascript/Recent content in Javascript on Khang NghiemHugoenTue, 23 Jun 2026 00:00:00 +0000https://www.khangnghiem.com/post/nodejs-single-threaded/Tue, 23 Jun 2026 00:00:00 +0000https://www.khangnghiem.com/post/nodejs-single-threaded/<p>&ldquo;Node.js is single-threaded.&rdquo; You&rsquo;ve probably heard this. It&rsquo;s true. And also kind of misleading.</p> <p>If it only has one thread, how does it handle thousands of connections?</p> <hr> <h2 id="what-most-people-assume">What most people assume</h2> <p>Coming from Java or Python, developers expect:</p> <ul> <li>Request 1 gets Thread 1</li> <li>Request 2 gets Thread 2</li> <li>Request 3 gets Thread 3</li> </ul> <p>One thread means one request at a time. That would make Node.js useless for any real server. But that&rsquo;s not how it works.</p>