v8/test/js-perf-test/BigInt/to-boolean.js

// Copyright 2019 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.

"use strict";

const ITERATIONS = 100000;

// This dummy ensures that the feedback for benchmark.run() in the Measure function
// from base.js is not monomorphic, thereby preventing the benchmarks below from being inlined.
// This ensures consistent behavior and comparable results.
new BenchmarkSuite('Prevent-Inline-Dummy', [10000], [
  new Benchmark('Prevent-Inline-Dummy', true, false, 0, () => {})
]);


new BenchmarkSuite('ToBoolean', [10000], [
  new Benchmark('ToBoolean', true, false, 0, TestToBoolean),
]);


new BenchmarkSuite('BooleanConstructor', [10000], [
  new Benchmark('BooleanConstructor', true, false, 0, TestBooleanConstructor),
]);


new BenchmarkSuite('NewBooleanConstructor', [10000], [
  new Benchmark('NewBooleanConstructor', true, false, 0, TestNewBooleanConstructor),
]);


function TestBooleanConstructor() {
  let kl = true;
  for (let i = 0; i < ITERATIONS; ++i) {
    // Store to a variable to prevent elimination.
    // Keep a depedency on the loop counter to prevent hoisting.
    kl = Boolean(i % 2 == 0 ? 42n : 32n);
  }
  return kl;
}


function TestNewBooleanConstructor() {
  let kl = true;
  for (let i = 0; i < ITERATIONS; ++i) {
    // Store to a variable to prevent elimination.
    // Keep a depedency on the loop counter to prevent hoisting.
    kl = new Boolean(i % 2 == 0 ? 42n : 32n);
  }
  return kl;
}


function TestToBoolean() {
  let kl = true;
  for (let i = 0; i < ITERATIONS; ++i) {
    // Store to a variable to prevent elimination.
    // Keep a depedency on the loop counter to prevent hoisting.
    kl = (i % 2 == 0 ? 42n : 32n) ? true : false;
  }
  return kl;
}