Asger Feldthaus
e6793f76ee
- Use strong-mode types for more precise tree shaking. - Bail out nicely if dart:mirrors is used. - Run the tree shaker in the VM target. The initial tree-shaking pass could be combined with the type checking pass (inserting implicit down casts) but for now they remain separate. R=kmillikin@google.com Committed: https://github.com/dart-lang/sdk/commit/71efbad90c07bece4010162b77d3b51e79b0a34d Review-Url: https://codereview.chromium.org/2627723003 .
66 lines
2.0 KiB
Dart
66 lines
2.0 KiB
Dart
#!/usr/bin/env dart
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// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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library kernel.treeshaker_membench;
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import 'package:kernel/kernel.dart';
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import 'package:kernel/transformations/treeshaker.dart';
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import 'package:kernel/class_hierarchy.dart';
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import 'package:kernel/core_types.dart';
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import 'package:args/args.dart';
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import 'dart:io';
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ArgParser argParser = new ArgParser(allowTrailingOptions: true)
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..addOption('count',
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abbr: 'c', help: 'Build N copies of the tree shaker', defaultsTo: '100')
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..addFlag('strong', help: 'Run the tree shaker in strong mode');
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String usage = """
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Usage: treeshaker_membench [options] FILE.dill
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Options:
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${argParser.usage}
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""";
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/// Builds N copies of the tree shaker data structure for the given program.
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/// Pass --print-metrics to the Dart VM to measure the memory use.
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main(List<String> args) {
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if (args.length == 0) {
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print(usage);
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exit(1);
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}
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ArgResults options = argParser.parse(args);
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if (options.rest.length != 1) {
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print('Exactly one file should be given');
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exit(1);
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}
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String filename = options.rest.single;
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bool strongMode = options['strong'];
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Program program = loadProgramFromBinary(filename);
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ClassHierarchy hierarchy = new ClassHierarchy(program);
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CoreTypes coreTypes = new CoreTypes(program);
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int copyCount = int.parse(options['count']);
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TreeShaker buildTreeShaker() {
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return new TreeShaker(program,
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hierarchy: hierarchy, coreTypes: coreTypes, strongMode: strongMode);
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}
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List<TreeShaker> keepAlive = <TreeShaker>[];
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for (int i = 0; i < copyCount; ++i) {
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keepAlive.add(buildTreeShaker());
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}
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print('$copyCount copies built');
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if (args.contains('-v')) {
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// Use of the list for something to avoid premature GC.
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for (var treeShaker in keepAlive) {
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treeShaker.getClassRetention(hierarchy.rootClass);
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}
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}
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}
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