Fix VM memory allocation optimizations by reducing what we allocate on the heap

internal/builtins/find.go

@@ -20,7 +20,7 @@ func Find(args ...object.Object) object.Object {
 	}
 
 	// find substring in string
-	if haystack, ok := args[0].(*object.String); ok {
+	if haystack, ok := args[0].(object.String); ok {
 		if err := typing.Check(
 			"find", args,
 			typing.WithTypes(object.StringType, object.StringType),
@@ -28,9 +28,9 @@ func Find(args ...object.Object) object.Object {
 			return newError(err.Error())
 		}
 
-		needle := args[1].(*object.String)
+		needle := args[1].(object.String)
 		index := strings.Index(haystack.Value, needle.Value)
-		return &object.Integer{Value: int64(index)}
+		return object.Integer{Value: int64(index)}
 	}
 
 	// find in array
@@ -40,9 +40,9 @@ func Find(args ...object.Object) object.Object {
 			return needle.Compare(haystack.Elements[i]) == 0
 		})
 		if i < len(haystack.Elements) && needle.Compare(haystack.Elements[i]) == 0 {
-			return &object.Integer{Value: int64(i)}
+			return object.Integer{Value: int64(i)}
 		}
-		return &object.Integer{Value: -1}
+		return object.Integer{Value: -1}
 	}
 
 	return newError(