f68dcc924b
- Move fast paths from builtins.cc ArraySlice to ElementsAccessor - Handle more argument types in the fast path BUG= Review URL: https://codereview.chromium.org/1321773002 Cr-Commit-Position: refs/heads/master@{#30471}
58 lines
2.4 KiB
JavaScript
58 lines
2.4 KiB
JavaScript
// Copyright 2012 the V8 project authors. All rights reserved.
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above
|
|
// copyright notice, this list of conditions and the following
|
|
// disclaimer in the documentation and/or other materials provided
|
|
// with the distribution.
|
|
// * Neither the name of Google Inc. nor the names of its
|
|
// contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
// Flags: --allow-natives-syntax
|
|
|
|
// Should not take a very long time (n^2 algorithms are bad)
|
|
|
|
function do_slices() {
|
|
var data = new Array(1024 * 12); // 12kB
|
|
|
|
for (var i = 0; i < data.length; i++) {
|
|
data[i] = 255;
|
|
}
|
|
|
|
var start = Date.now();
|
|
|
|
for (i = 0; i < 20000; i++) {
|
|
data.slice(4, 1);
|
|
}
|
|
|
|
return Date.now() - start;
|
|
}
|
|
|
|
// Should never take more than 3 seconds (if the bug is fixed, the test takes
|
|
// considerably less time than 3 seconds).
|
|
assertTrue(do_slices() < (3 * 1000));
|
|
|
|
// Make sure that packed and unpacked array slices are still properly handled
|
|
var holey_array = [1, 2, 3, 4, 5,,,,,,];
|
|
assertEquals([undefined], holey_array.slice(6, 7));
|
|
assertEquals(undefined, holey_array.slice(6, 7)[0]);
|
|
assertEquals([], holey_array.slice(2, 1));
|
|
assertEquals(3, holey_array.slice(2, 3)[0]);
|