v8/test/mjsunit/array-shift2.js
bmeurer@chromium.org 7c45d49861 Improve Array.shift() performance for small arrays.
TEST=mjsunit/array-shift,mjsunit/array-shift2,mjsunit/array-shift3
R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/279743002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21203 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2014-05-09 08:28:25 +00:00

19 lines
556 B
JavaScript

// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax
Object.defineProperty(Array.prototype, "1", {
get: function() { return "element 1"; },
set: function(value) { }
});
function test(array) {
array.shift();
return array;
}
assertEquals(["element 1",2], test(["0",,2]));
assertEquals(["element 1",{}], test([{},,{}]));
%OptimizeFunctionOnNextCall(test);
assertEquals(["element 1",0], test([{},,0]));