src: use AliasedUint32Array for encodeInto results

Getting the buffer from a TypedArray created from the JS land
incurs a copy. For encodeInto() results we can just use an
AliasedArray and let the binding always own the store.

PR-URL: https://github.com/nodejs/node/pull/46658
Reviewed-By: Darshan Sen <raisinten@gmail.com>

lib/internal/encoding.js

@@ -13,7 +13,6 @@ const {
   StringPrototypeSlice,
   Symbol,
   SymbolToStringTag,
-  Uint32Array,
   Uint8Array,
 } = primordials;
 
@@ -49,12 +48,12 @@ const {
   validateString,
   validateObject,
 } = require('internal/validators');
-
+const binding = internalBinding('encoding_binding');
 const {
   encodeInto,
   encodeUtf8String,
   decodeUTF8,
-} = internalBinding('encoding_binding');
+} = binding;
 
 const { Buffer } = require('buffer');
 
@@ -318,8 +317,6 @@ function getEncodingFromLabel(label) {
   return encodings.get(trimAsciiWhitespace(label.toLowerCase()));
 }
 
-const encodeIntoResults = new Uint32Array(2);
-
 class TextEncoder {
   constructor() {
     this[kEncoder] = true;
@@ -340,8 +337,12 @@ class TextEncoder {
     validateString(src, 'src');
     if (!dest || !isUint8Array(dest))
       throw new ERR_INVALID_ARG_TYPE('dest', 'Uint8Array', dest);
-    encodeInto(src, dest, encodeIntoResults);
-    return { read: encodeIntoResults[0], written: encodeIntoResults[1] };
+
+    encodeInto(src, dest);
+    // We need to read from the binding here since the buffer gets refreshed
+    // from the snapshot.
+    const { 0: read, 1: written } = binding.encodeIntoResults;
+    return { read, written };
   }
 
   [inspect](depth, opts) {