Function benchmarkQueryRegex

benchmark/performance.js:719–744

* Benchmark: Query $regex * * Measures a standard Parse.Query.find() with a $regex constraint. * Each iteration uses a different regex to avoid database query cache hits.

(name)

 * Each iteration uses a different regex to avoid database query cache hits.
 */
async function benchmarkQueryRegex(name) {
  // Seed objects that will match the various regex patterns
  const objects = [];
  for (let i = 0; i < 1_000; i++) {
    const obj = new Parse.Object('BenchmarkRegex');
    obj.set('field', `BenchRegex_${i} data`);
    objects.push(obj);
  }
  await Parse.Object.saveAll(objects);

  let counter = 0;

  const bases = ['^BenchRegex_', 'BenchRegex_', '[a-z]+_'];

  return measureOperation({
    name,
    iterations: 1_000,
    operation: async () => {
      const idx = counter++;
      const regex = bases[idx % bases.length] + idx;
      const query = new Parse.Query('BenchmarkRegex');
      query._addCondition('field', '$regex', regex);
      await query.find();
    },
  });
}

/**
 * Benchmark: LiveQuery $regex end-to-end