dart2js send stats, includes:

pkg/compiler/tool/stats/print_summary.dart

+// Copyright (c) 2015, 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.
+
+/// Utility to display [GlobalResult] as a table on the command line.
+library compiler.tool.stats.print_summary;
+
+import 'dart:io';
+import 'dart:convert';
+import 'dart:math' show max;
+import 'package:compiler/src/stats/stats.dart';
+
+main(args) {
+  var file = args.length > 0 ? args[0] : 'out.js.stats.json';
+  var results = GlobalResult.fromJson(
+      JSON.decode(new File(file).readAsStringSync()));
+  print(formatAsTable(results));
+}
+
+/// Formats [results] as a table.
+String formatAsTable(GlobalResult results) {
+  var visitor = new _Counter();
+  results.accept(visitor);
+  var table = new _Table();
+  table.declareColumn('bundle');
+
+  int colorIndex = 0;
+  visitAllMetrics((m, _) {
+    if (m is GroupedMetric) colorIndex = (colorIndex + 1) % _groupColors.length;
+    table.declareColumn(m.name,
+        abbreviate: true, color: _groupColors[colorIndex]);
+  });
+  table.addHeader();
+  appendCount(n) => table.addEntry(n == null ? 0 : n);
+
+  for (var bundle in visitor.bundleTotals.keys) {
+    table.addEntry(bundle);
+    visitAllMetrics(
+        (m, _) => appendCount(visitor.bundleTotals[bundle].counters[m]));
+  }
+  table.addEmptyRow();
+  table.addHeader();
+  table.addEntry('total');
+  visitAllMetrics((m, _) => appendCount(visitor.totals.counters[m]));
+
+  appendPercent(count, total) {
+    if (count == null) count = 0;
+    if (total == null) total = 0;
+    var percent = count * 100 / total;
+    table.addEntry(percent == 100 ? 100 : percent.toStringAsFixed(2));
+  }
+
+  table.addEntry('%');
+  visitAllMetrics((metric, parents) {
+    if (parents == null || parents.isEmpty) {
+      table.addEntry(100);
+    } else {
+      appendPercent(visitor.totals.counters[metric],
+          visitor.totals.counters[parents[0]]);
+    }
+  });
+
+  return table.toString();
+}
+
+/// Visitor that adds up results for all functions in libraries, and all
+/// libraries in a bundle.
+class _Counter extends RecursiveResultVisitor {
+  Map<String, Measurements> bundleTotals = {};
+  Measurements currentBundleTotals;
+  Measurements totals = new Measurements();
+
+  visitBundle(BundleResult bundle) {
+    currentBundleTotals =
+        bundleTotals.putIfAbsent(bundle.name, () => new Measurements());
+    super.visitBundle(bundle);
+    totals.addFrom(currentBundleTotals);
+  }
+
+  visitFunction(FunctionResult function) {
+    currentBundleTotals.addFrom(function.measurements);
+  }
+}
+
+/// Helper class to combine all the information in table form.
+class _Table {
+  int _totalColumns = 0;
+  int get totalColumns => _totalColumns;
+
+  /// Abbreviations, used to make headers shorter.
+  Map<String, String> abbreviations = {};
+
+  /// Width of each column.
+  List<int> widths = <int>[];
+
+  /// The header for each column (`header.length == totalColumns`).
+  List header = [];
+
+  /// The color for each column (`color.length == totalColumns`).
+  List colors = [];
+
+  /// Each row on the table. Note that all rows have the same size
+  /// (`rows[*].length == totalColumns`).
+  List<List> rows = [];
+
+  /// Columns to skip, for example, if they are all zero entries.
+  List<bool> _skipped = <bool>[];
+
+  /// Whether we started adding entries. Indicates that no more columns can be
+  /// added.
+  bool _sealed = false;
+
+  /// Current row being built by [addEntry].
+  List _currentRow;
+
+  /// Add a column with the given [name].
+  void declareColumn(String name,
+      {bool abbreviate: false, String color: _NO_COLOR}) {
+    assert(!_sealed);
+    var headerName = name;
+    if (abbreviate) {
+      // abbreviate the header by using only the initials of each word
+      headerName = name.split(' ')
+          .map((s) => s.substring(0, 1).toUpperCase()).join('');
+      while (abbreviations[headerName] != null) headerName = "$headerName'";
+      abbreviations[headerName] = name;
+    }
+    widths.add(max(5, headerName.length + 1));
+    header.add(headerName);
+    colors.add(color);
+    _skipped.add(_totalColumns > 0);
+    _totalColumns++;
+  }
+
+  /// Add an entry in the table, creating a new row each time [totalColumns]
+  /// entries are added.
+  void addEntry(entry) {
+    if (_currentRow == null) {
+      _sealed = true;
+      _currentRow = [];
+    }
+    int pos = _currentRow.length;
+    assert(pos < _totalColumns);
+
+    widths[pos] = max(widths[pos], '$entry'.length + 1);
+    _currentRow.add('$entry');
+    if (entry is int && entry != 0) {
+      _skipped[pos] = false;
+    }
+
+    if (pos + 1 == _totalColumns) {
+      rows.add(_currentRow);
+      _currentRow = [];
+    }
+  }
+
+  /// Add an empty row to divide sections of the table.
+  void addEmptyRow() {
+    var emptyRow = [];
+    for (int i = 0; i < _totalColumns; i++) {
+      emptyRow.add('-' * widths[i]);
+    }
+    rows.add(emptyRow);
+  }
+
+  /// Enter the header titles. OK to do so more than once in long tables.
+  void addHeader() {
+    rows.add(header);
+  }
+
+  /// Generates a string representation of the table to print on a terminal.
+  // TODO(sigmund): add also a .csv format
+  String toString() {
+    var sb = new StringBuffer();
+    sb.write('\n');
+    for (var row in rows) {
+      var lastColor = _NO_COLOR;
+      for (int i = 0; i < _totalColumns; i++) {
+        if (_skipped[i]) continue;
+        var entry = row[i];
+        var color = colors[i];
+        if (lastColor != color) {
+          sb.write(color);
+          lastColor = color;
+        }
+        // Align first column to the left, everything else to the right.
+        sb.write(
+            i == 0 ? entry.padRight(widths[i]) : entry.padLeft(widths[i] + 1));
+      }
+      if (lastColor != _NO_COLOR) sb.write(_NO_COLOR);
+      sb.write('\n');
+    }
+    sb.write('\nWhere:\n');
+    for (var id in abbreviations.keys) {
+      sb.write('  $id:'.padRight(7));
+      sb.write(' ${abbreviations[id]}\n');
+    }
+    return sb.toString();
+  }
+}
+
+const _groupColors = const [
+  _YELLOW_COLOR,
+  _NO_COLOR,
+];
+
+const _NO_COLOR = "\x1b[0m";
+const _GREEN_COLOR = "\x1b[32m";
+const _YELLOW_COLOR = "\x1b[33m";
+const _WHITE_COLOR = "\x1b[37m";