From 3592b0b847d0c4348fc37be868ac22607ce426de Mon Sep 17 00:00:00 2001
From: Richard Viney <richard.viney@gmail.com>
Date: Sun, 23 Jun 2024 16:59:06 +1200
Subject: Improve Base64 decode performance

---
 src/gleam_stdlib.mjs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/gleam_stdlib.mjs')

diff --git a/src/gleam_stdlib.mjs b/src/gleam_stdlib.mjs
index c4111f9..d067cec 100644
--- a/src/gleam_stdlib.mjs
+++ b/src/gleam_stdlib.mjs
@@ -551,7 +551,11 @@ export function encode64(bit_array, padding) {
 export function decode64(sBase64) {
   try {
     const binString = atob(sBase64);
-    const array = Uint8Array.from(binString, (c) => c.charCodeAt(0));
+    const length = binString.length;
+    const array = new Uint8Array(length);
+    for (let i = 0; i < length; i++) {
+        array[i] = binString.charCodeAt(i);
+    }
     return new Ok(new BitArray(array));
   } catch {
     return new Error(Nil);
-- 
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