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1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file | |
2 // for details. All rights reserved. Use of this source code is governed by a | |
3 // BSD-style license that can be found in the LICENSE file. | |
4 | |
5 /// This tool gives a breakdown of code size by deferred part in the program. | |
6 library dart2js_info.bin.deferred_library_size; | |
7 | |
8 import 'dart:math'; | |
9 | |
10 import 'package:dart2js_info/info.dart'; | |
11 import 'package:dart2js_info/src/util.dart'; | |
12 | |
13 main(args) async { | |
14 // TODO(het): Would be faster to only parse the 'outputUnits' part | |
15 var info = await infoFromFile(args.first); | |
16 var sizeByImport = getSizeByImport(info); | |
17 printSizes(sizeByImport, info.program.size); | |
18 } | |
19 | |
20 class ImportSize { | |
21 final String import; | |
22 final int size; | |
23 | |
24 const ImportSize(this.import, this.size); | |
25 | |
26 String toString() { | |
27 return '$import: $size'; | |
28 } | |
29 } | |
30 | |
31 void printSizes(Map<String, int> sizeByImport, int programSize) { | |
32 var importSizes = <ImportSize>[]; | |
33 sizeByImport.forEach((import, size) { | |
34 importSizes.add(new ImportSize(import, size)); | |
35 }); | |
36 // Sort by size, largest first. | |
37 importSizes.sort((a, b) => b.size - a.size); | |
38 var longest = importSizes.fold('Percent of code deferred'.length, | |
39 (longest, importSize) => max(longest, importSize.import.length)); | |
40 | |
41 _printRow(label, data, {int width: 15}) { | |
42 print('${label.toString().padRight(longest + 1)}' | |
43 '${data.toString().padLeft(width)}'); | |
44 } | |
45 | |
46 print(''); | |
47 print('Size by library'); | |
48 print('-' * (longest + 16)); | |
49 for (var importSize in importSizes) { | |
50 _printRow(importSize.import, importSize.size); | |
Siggi Cherem (dart-lang)
2016/08/02 21:50:26
were you also going to print out the transitive-si
Harry Terkelsen
2016/08/02 21:57:49
Done.
| |
51 } | |
52 print('-' * (longest + 16)); | |
53 | |
54 var mainChunkSize = sizeByImport['main']; | |
55 var deferredSize = programSize - mainChunkSize; | |
56 var percentDeferred = (deferredSize * 100 / programSize).toStringAsFixed(2); | |
57 _printRow('Main chunk size', mainChunkSize); | |
58 _printRow('Deferred code size', deferredSize); | |
59 _printRow('Percent of code deferred', '$percentDeferred%'); | |
60 } | |
61 | |
62 Map<String, int> getSizeByImport(AllInfo info) { | |
63 var sizeByImport = <String, int>{}; | |
64 for (var outputUnit in info.outputUnits) { | |
65 if (outputUnit.name == 'main' || outputUnit.name == null) { | |
66 sizeByImport['main'] = outputUnit.size; | |
67 } else { | |
68 for (var import in outputUnit.imports) { | |
69 sizeByImport.putIfAbsent(import, () => 0); | |
70 sizeByImport[import] += outputUnit.size; | |
71 } | |
72 } | |
73 } | |
74 return sizeByImport; | |
75 } | |
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