From df49d3f0c6ea17e9dcf552106f7b5464bc99c4dc Mon Sep 17 00:00:00 2001
From: Laurenz <laurmaedje@gmail.com>
Date: Mon, 9 Oct 2023 15:15:47 +0200
Subject: [PATCH] Optimize `Str::rev`

---
 crates/typst/src/eval/str.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/crates/typst/src/eval/str.rs b/crates/typst/src/eval/str.rs
index e7df00e1a..666c3c723 100644
--- a/crates/typst/src/eval/str.rs
+++ b/crates/typst/src/eval/str.rs
@@ -591,7 +591,11 @@ impl Str {
     /// Reverse the string.
     #[func(title = "Reverse")]
     pub fn rev(&self) -> Str {
-        self.as_str().graphemes(true).rev().collect::<String>().into()
+        let mut s = EcoString::with_capacity(self.0.len());
+        for grapheme in self.as_str().graphemes(true).rev() {
+            s.push_str(grapheme);
+        }
+        s.into()
     }
 }