From: Joshua Simmons <josh@nega.tv>
Date: Wed, 12 Jul 2023 22:30:22 +0000 (+0200)
Subject: narcissus: Avoid some useless allocations
X-Git-Url: https://git.nega.tv//gitweb.cgi?a=commitdiff_plain;h=c2006c33949902c8a7f09a5a1406f0277747bab2;p=josh%2Fnarcissus

narcissus: Avoid some useless allocations
---

diff --git a/bins/narcissus/src/main.rs b/bins/narcissus/src/main.rs
index a89c59f..2402e7e 100644
--- a/bins/narcissus/src/main.rs
+++ b/bins/narcissus/src/main.rs
@@ -1,4 +1,4 @@
-use std::time::Instant;
+use std::{fmt::Write, time::Instant};
 
 use crate::{
     fonts::{FontFamily, Fonts},
@@ -177,6 +177,7 @@ pub fn main() {
         }
     }
 
+    let mut font_size_str = String::new();
     let mut glyph_instances = Vec::new();
     let mut line_glyph_indices = Vec::new();
     let mut line_kern_advances = Vec::new();
@@ -321,7 +322,8 @@ pub fn main() {
                 break;
             }
 
-            let font_size_str = format!("{font_size_px}: ");
+            font_size_str.clear();
+            write!(&mut font_size_str, "{font_size_px}: ").unwrap();
 
             line_glyph_indices.clear();
             line_glyph_indices.extend(font_size_str.chars().chain(text.chars()).map(|c| {