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ec02b811a8
Pick up latest commit from the 5.4-lkgr branch. deps: edit V8 gitignore to allow trace event copy deps: update V8 trace event to 315bf1e2d45be7d53346c31cfcc37424a32c30c8 deps: edit V8 gitignore to allow gtest_prod.h copy deps: update V8 gtest to 6f8a66431cb592dad629028a50b3dd418a408c87 PR-URL: https://github.com/nodejs/node/pull/8317 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
29 lines
889 B
JavaScript
29 lines
889 B
JavaScript
// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Create a prototype object which has a lot of fast properties.
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var body = "";
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for (var i = 0; i < 100; i++) {
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body += `this.a${i} = 0;\n`;
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}
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var Proto = new Function(body);
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function A() {}
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A.prototype = new Proto();
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// Create a object and add properties that already exist in the prototype.
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// At some point the object will turn into a dictionary mode and one of
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// the fast details from the prototype will be reinterpreted as a details
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// for a new property ...
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var o = new A();
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for (var i = 0; i < 100; i++) {
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o["a" + i] = i;
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}
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// ... which will break the enumeration order of the slow properties.
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var names = Object.getOwnPropertyNames(o);
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for (var i = 0; i < 100; i++) {
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assertEquals("a" + i, names[i]);
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}
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