chore: also prevent pooled TypedArrays in non-shipped /utf32.js

Author: ChALkeR

fallback/utf32.js

@@ -58,6 +58,7 @@ export function decode(u32) {
 }
 
 // Only defined on valid input
+// Returns non-pooled exact view
 // TODO: add fast path for prefix without high bits
 export function utf16to32(u16) {
   const length = u16.length
@@ -72,12 +73,13 @@ export function utf16to32(u16) {
     }
   }
 
-  return i === length ? u32 : u32.subarray(0, i)
+  return i === length ? u32 : u32.slice(0, i)
 }
 
 // Only defined on valid input
+// Can return a subarray
 // TODO: add fast path for prefix without high bits?
-export function utf32to16(u32) {
+export function utf32to16view(u32) {
   const length = u32.length
   const u16 = new Uint16Array(length * 2)
   let i = 0

utf32.js

@@ -57,7 +57,7 @@ function decode(input, loose = false, format = 'uint32') {
   if (isHermes) return js.decode(u32, loose)
 
   // Significantly faster on Node.js, Chromium, v8, WebKit
-  const u16 = js.utf32to16(u32)
+  const u16 = js.utf32to16view(u32)
   return loose ? utf16.utf16toStringLoose(u16) : utf16.utf16toString(u16)
 }