intl/benchmark.js

/*
 * Copyright (C) 2025 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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
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class Benchmark {
  iterationCount;
  verbose;
  lastResult;
  totalLength = 0;
  expectedMinLength = 0;

  constructor({ iterationCount, verbose = false } = {}) {
    this.iterationCount = iterationCount;
    this.verbose = verbose;
  }

  runIteration() {
    // See implementations in src/.
    const { lastResult, totalLength, expectedMinLength } = runTest(
      this.verbose
    );
    this.lastResult = lastResult;
    this.totalLength += totalLength;
    this.expectedMinLength = expectedMinLength;
  }

  validate() {
    const expectedMinTotalLength = this.expectedMinLength * this.iterationCount;
    console.assert(
      this.totalLength >= expectedMinTotalLength,
      `Invalid totalLength = ${this.totalLength}, expected >= ${expectedMinTotalLength}`
    );
  }
}