tests/standalone/fragmentation_typed_data_test.dart

// Copyright (c) 2019, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// See fragmentation_test.dart for more information.
//
// VMOptions=--no_concurrent_mark --no_concurrent_sweep
// VMOptions=--no_concurrent_mark --concurrent_sweep
// VMOptions=--no_concurrent_mark --use_compactor
// VMOptions=--no_concurrent_mark --use_compactor --force_evacuation
// VMOptions=--concurrent_mark --no_concurrent_sweep
// VMOptions=--concurrent_mark --concurrent_sweep
// VMOptions=--concurrent_mark --use_compactor
// VMOptions=--concurrent_mark --use_compactor --force_evacuation

import 'dart:io';
import 'dart:typed_data';

main() {
  // We have less memory available on the Android testing devices, and if we
  // allocate to much the kernel may summarily terminate us.
  final double factor = Platform.isAndroid ? 0.5 : 1.0;

  final List<List?> arrays = [];
  // Fill up heap with alternate large-small items.
  for (int i = 0; i < 500000 * factor; i++) {
    arrays.add(new Uint32List(260));
    arrays.add(new Uint32List(1));
  }
  // Clear the large items so the heap has large gaps.
  for (int i = 0; i < arrays.length; i += 2) {
    arrays[i] = null;
  }
  // Allocate a lot of large items which don't fit in the gaps created above.
  for (int i = 0; i < 600000 * factor; i++) {
    arrays.add(new Uint32List(300));
  }
}