From f63d960bdc8471de501604f782011a25fbac4124 Mon Sep 17 00:00:00 2001
From: Richard Viney <richard.viney@gmail.com>
Date: Tue, 8 Oct 2024 00:16:52 +1300
Subject: Improve JS string performance by caching the Intl Segmenter

---
 src/gleam_stdlib.mjs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/gleam_stdlib.mjs b/src/gleam_stdlib.mjs
index 50ebb46..1c0754f 100644
--- a/src/gleam_stdlib.mjs
+++ b/src/gleam_stdlib.mjs
@@ -156,9 +156,12 @@ export function graphemes(string) {
   }
 }
 
+let segmenter = undefined;
+
 function graphemes_iterator(string) {
   if (globalThis.Intl && Intl.Segmenter) {
-    return new Intl.Segmenter().segment(string)[Symbol.iterator]();
+    segmenter ??= new Intl.Segmenter();
+    return segmenter.segment(string)[Symbol.iterator]();
   }
 }
 
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