Optimize reversed() for arrays

libraries/stdlib/common/src/generated/_Arrays.kt

@@ -5771,89 +5771,71 @@ public fun CharArray.reverse(fromIndex: Int, toIndex: Int): Unit {
  */
 public fun <T> Array<out T>.reversed(): List<T> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**
  * Returns a list with elements in reversed order.
  */
 public fun ByteArray.reversed(): List<Byte> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**
  * Returns a list with elements in reversed order.
  */
 public fun ShortArray.reversed(): List<Short> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**
  * Returns a list with elements in reversed order.
  */
 public fun IntArray.reversed(): List<Int> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**
  * Returns a list with elements in reversed order.
  */
 public fun LongArray.reversed(): List<Long> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**
  * Returns a list with elements in reversed order.
  */
 public fun FloatArray.reversed(): List<Float> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**
  * Returns a list with elements in reversed order.
  */
 public fun DoubleArray.reversed(): List<Double> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**
  * Returns a list with elements in reversed order.
  */
 public fun BooleanArray.reversed(): List<Boolean> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**
  * Returns a list with elements in reversed order.
  */
 public fun CharArray.reversed(): List<Char> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**

libraries/stdlib/common/src/generated/_UArrays.kt

@@ -2802,9 +2802,7 @@ public inline fun UShortArray.reverse(fromIndex: Int, toIndex: Int): Unit {
 @ExperimentalUnsignedTypes
 public fun UIntArray.reversed(): List<UInt> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**
@@ -2814,9 +2812,7 @@ public fun UIntArray.reversed(): List<UInt> {
 @ExperimentalUnsignedTypes
 public fun ULongArray.reversed(): List<ULong> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**
@@ -2826,9 +2822,7 @@ public fun ULongArray.reversed(): List<ULong> {
 @ExperimentalUnsignedTypes
 public fun UByteArray.reversed(): List<UByte> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**
@@ -2838,9 +2832,7 @@ public fun UByteArray.reversed(): List<UByte> {
 @ExperimentalUnsignedTypes
 public fun UShortArray.reversed(): List<UShort> {
     if (isEmpty()) return emptyList()
-    val list = toMutableList()
-    list.reverse()
-    return list
+    return copyOf().apply { reverse() }.asList()
 }
 
 /**

libraries/tools/kotlin-stdlib-gen/src/templates/Ordering.kt

@@ -103,9 +103,7 @@ object Ordering : TemplateGroupBase() {
         body(ArraysOfObjects, ArraysOfPrimitives, ArraysOfUnsigned) {
             """
             if (isEmpty()) return emptyList()
-            val list = toMutableList()
-            list.reverse()
-            return list
+            return copyOf().apply { reverse() }.asList()
             """
         }