From 17146d2ce6cd083255dd51d52dbd712d4868da72 Mon Sep 17 00:00:00 2001
From: Tarasov Aleksandr <55220741+arabianq@users.noreply.github.com>
Date: Mon, 31 Aug 2026 04:36:36 +0300
Subject: [PATCH] perf: Optimize system font loading by replacing concat() with
 chain() (#189)

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
---
 pwsp-gui/src/gui/mod.rs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/pwsp-gui/src/gui/mod.rs b/pwsp-gui/src/gui/mod.rs
index dc3928a..1dff3fa 100644
--- a/pwsp-gui/src/gui/mod.rs
+++ b/pwsp-gui/src/gui/mod.rs
@@ -389,9 +389,13 @@ fn load_system_fonts(fonts: &mut FontDefinitions) -> Result<()> {
     let (_, ja_sans) = find_for_locale("ja", FontStyle::Sans);
     let (_, ar_sans) = find_for_locale("ar", FontStyle::Sans);
 
-    let system_fonts = [en_sans, en_serif, ja_sans, ar_sans].concat();
+    let system_fonts = en_sans
+        .into_iter()
+        .chain(en_serif)
+        .chain(ja_sans)
+        .chain(ar_sans);
 
-    for font in system_fonts.iter().rev() {
+    for font in system_fonts.rev() {
         let font_bytes = match &font.source {
             FoundFontSource::Path(path) => fs::read(path)?,
             FoundFontSource::Bytes(bytes) => bytes.to_vec(),