Fmt on rustbiteshttps://www.rustbites.com/tags/fmt/Recent content in Fmt on rustbitesHugoenMon, 08 Jun 2026 11:56:48 +0200187. fmt::Write — Stop Allocating a Temp String Just to Append Ithttps://www.rustbites.com/posts/bite-187/Sun, 07 Jun 2026 09:00:00 +0100https://www.rustbites.com/posts/bite-187/<p><code>out.push_str(&amp;format!(&quot;{name}: {score}&quot;))</code> builds a brand-new <code>String</code>, copies it into <code>out</code>, then throws it away — every single iteration. One <code>use std::fmt::Write;</code> and <code>write!</code> formats straight into your buffer instead.</p>