d98e684f83
Benchmark BitwiseAnd, Divide, and Exponentiate. Add explicitly truncated cases to Multiply. Bug: v8:9407 Change-Id: I89b2a624c0a60034fbe875958461a5f2ab826ade Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3829467 Commit-Queue: Qifan Pan <panq@google.com> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org> Cr-Commit-Position: refs/heads/main@{#82514}
49 lines
1.4 KiB
JavaScript
49 lines
1.4 KiB
JavaScript
// Copyright 2022 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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"use strict";
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d8.file.execute('bigint-util.js');
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let random_exponents = [];
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// This dummy ensures that the feedback for benchmark.run() in the Measure
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// function from base.js is not monomorphic, thereby preventing the benchmarks
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// below from being inlined. This ensures consistent behavior and comparable
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// results.
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new BenchmarkSuite('Prevent-Inline-Dummy', [10000], [
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new Benchmark('Prevent-Inline-Dummy', true, false, 0, () => {})
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]);
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new BenchmarkSuite('Exponentiate-Base-Two', [10000], [
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new Benchmark('Exponentiate-Base-Two', true, false, 0,
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TestExponentiateBaseTwo, SetUpTestExponentiateBaseTwo)
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]);
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function SetUpTestExponentiateBaseTwo() {
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random_exponents = [];
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// Restrict the maximum length of exponents to 20 bits so that the durations
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// are reasonable and BigIntTooBig exceptions can be avoided.
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const max_in_4bits = 20 / 4;
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for (let i = 0; i < TEST_ITERATIONS; ++i) {
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const bits = Math.floor(Math.random() * max_in_4bits) * 4;
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const bigint = RandomBigIntWithBits(bits);
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// Exponents are non-negative.
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random_exponents.push(bigint);
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}
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}
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function TestExponentiateBaseTwo() {
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let sum = 0n;
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for (let i = 0; i < TEST_ITERATIONS; ++i) {
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sum += 2n ** random_exponents[i];
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}
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return sum;
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}
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