Optimize: Don't copy Array in Float16Array constructor

src/Float16Array.mjs

@@ -1,5 +1,5 @@
 import { wrapInArrayIterator } from "./helper/arrayIterator.mjs";
-import { isArrayBuffer, isCanonicalIntegerIndexString, isIterable, isObject, isObjectLike, isSharedArrayBuffer, isTypedArray, isUint16Array } from "./helper/is.mjs";
+import { isArrayBuffer, isCanonicalIntegerIndexString, isIterable, isObject, isObjectLike, isOrdinaryArray, isSharedArrayBuffer, isTypedArray, isUint16Array } from "./helper/is.mjs";
 import { convertToNumber, roundToFloat16Bits } from "./helper/lib.mjs";
 import { createPrivateStorage } from "./helper/private.mjs";
 import { LengthOfArrayLike, SpeciesConstructor, ToIntegerOrInfinity, defaultCompare } from "./helper/spec.mjs";
@@ -172,9 +172,17 @@ export class Float16Array extends Uint16Array {
 
       // Iterable (Array)
       } else if (isIterable(input)) {
-        list = [...input];
-        length = list.length;
-        super(length);
+        // for optimization
+        if (isOrdinaryArray(input)) {
+          list = input;
+          length = input.length;
+          super(length);
+
+        } else {
+          list = [...input];
+          length = list.length;
+          super(length);
+        }
 
       // ArrayLike
       } else {

src/helper/is.mjs

@@ -80,6 +80,23 @@ export function isIterable(value) {
   return isObject(value) && typeof value[Symbol.iterator] === "function";
 }
 
+/**
+ * @param {unknown} value
+ * @returns {value is any[]}
+ */
+ export function isOrdinaryArray(value) {
+  if (!Array.isArray(value)) {
+    return false;
+  }
+
+  const iterator = value[Symbol.iterator]();
+  if (toString.call(iterator) !== "[object Array Iterator]") {
+    return false;
+  }
+
+  return true;
+}
+
 /**
  * @param {unknown} value
  * @returns {value is string}