From 93c1fac7e6547342cef60b3a732380f4d0f6f4d5 Mon Sep 17 00:00:00 2001
From: William Bert <william@spanishdict.com>
Date: Mon, 22 Jan 2024 15:07:02 -0500
Subject: [PATCH] Cache with Map.

---
 lib/parsers/string.js | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/lib/parsers/string.js b/lib/parsers/string.js
index 5523fb2c6a..39f06593c2 100644
--- a/lib/parsers/string.js
+++ b/lib/parsers/string.js
@@ -1,13 +1,22 @@
 'use strict';
 
 const Iconv = require('iconv-lite');
+const decoderCache = new Map();
 
-exports.decode = function(buffer, encoding, start, end, options) {
+exports.decode = function (buffer, encoding, start, end, options) {
   if (Buffer.isEncoding(encoding)) {
     return buffer.toString(encoding, start, end);
   }
 
-  const decoder = Iconv.getDecoder(encoding, options || {});
+  const decoderArgs = { encoding, options: options || {} };
+  const decoder =
+    decoderCache.get(decoderArgs) ||
+    decoderCache
+      .set(
+        decoderArgs,
+        Iconv.getDecoder(decoderArgs.encoding, decoderArgs.options),
+      )
+      .get(decoderArgs);
 
   const res = decoder.write(buffer.slice(start, end));
   const trail = decoder.end();
@@ -15,7 +24,7 @@ exports.decode = function(buffer, encoding, start, end, options) {
   return trail ? res + trail : res;
 };
 
-exports.encode = function(string, encoding, options) {
+exports.encode = function (string, encoding, options) {
   if (Buffer.isEncoding(encoding)) {
     return Buffer.from(string, encoding);
   }