63 lines
1.9 KiB
JavaScript
63 lines
1.9 KiB
JavaScript
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// Copyright 2018 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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(() => {
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function Naive() {
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let index = -1;
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const length = array == null ? 0 : array.length;
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for (let index = 0; index < length; index++) {
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const value = array[index];
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if (func(value, index, array)) {
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result = value;
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break;
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}
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}
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}
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function NaiveSetup() {
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// Prime Naive with polymorphic cases.
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array = [1, 2, 3];
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Naive();
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Naive();
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array = [3.4]; Naive();
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array = new Array(10); array[0] = 'hello'; Naive();
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SmiSetup();
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delete array[1];
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}
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// Make sure we inline the callback, pick up all possible TurboFan
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// optimizations.
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function RunOptFast(multiple) {
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// Use of variable multiple in the callback function forces
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// context creation without escape analysis.
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//
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// Also, the arrow function requires inlining based on
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// SharedFunctionInfo.
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result = array.forEach((v, i, a) => v === `value ${multiple}`);
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}
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// Don't optimize because I want to optimize RunOptFast with a parameter
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// to be used in the callback.
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%NeverOptimizeFunction(OptFast);
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function OptFast() { RunOptFast(max_index); }
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function side_effect(a) { return a; }
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%NeverOptimizeFunction(side_effect);
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function OptUnreliable() {
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result = array.forEach(func, side_effect(array));
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}
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DefineHigherOrderTests([
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"NaiveForEachReplacement", Naive, NaiveSetup, v => v === max_index,
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"DoubleForEach", mc("forEach"), DoubleSetup, v => v === max_index + 0.5,
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"SmiForEach", mc("forEach"), SmiSetup, v => v === max_index,
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"FastForEach", mc("forEach"), FastSetup, v => v === `value ${max_index}`,
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"GenericForEach", mc("forEach", true), ObjectSetup, v => v === max_index,
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"OptFastForEach", OptFast, FastSetup, undefined,
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"OptUnreliableForEach", OptUnreliable, FastSetup, v => v === `value ${max_index}`
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]);
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})();
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