[benchmarks] contribute a package:intl benchmark

Change-Id: I9ce75ad7ba1599e4bd6311e0ae0397005d46fe86
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/409762
Commit-Queue: Devon Carew <devoncarew@google.com>
Reviewed-by: Stephen Adams <sra@google.com>

benchmarks/Intl/dart/format.dart

@@ -0,0 +1,103 @@
+// Copyright (c) 2014, 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.
+
+// Micro-benchmarks for formatting with Intl.
+
+import 'package:benchmark_harness/benchmark_harness.dart';
+import 'package:intl/intl.dart';
+
+var DATES = List.generate(
+  100,
+  (i) => DateTime.fromMillisecondsSinceEpoch(1417666640631 - i * 1649837618),
+);
+
+const DATE_FORMATS = ['Hm', 'MMM yyyy', 'MMM dd, yyyy'];
+
+var NUMBERS = [
+  12.345,
+  1.2345,
+  -12.345,
+  20000000.1,
+  -200000001.2,
+  ...List.generate(90, (i) => (i - 45) * i * 0.716739 + 0.21),
+];
+
+const NUMBER_FORMATS = ['\$#,##0.0', '#%', '#,##0', '#.##%'];
+
+const LOCALE = 'en_US';
+
+var g;
+
+class Base extends BenchmarkBase {
+  Base(name, variant) : super('Intl.$name.format.$variant');
+
+  var formatters;
+  var data;
+
+  @override
+  void run() {
+    for (var datum in data) {
+      for (var formatter in formatters) {
+        g = formatter.format(datum);
+      }
+    }
+
+    // TODO(devoncarew): Duplicated for golem investigation.
+    for (var datum in data) {
+      for (var formatter in formatters) {
+        g = formatter.format(datum);
+      }
+    }
+    // TODO(devoncarew): Duplicated for golem investigation.
+  }
+}
+
+class DateBenchmark extends Base {
+  DateBenchmark() : super('DateFormat', 'oneshot');
+
+  @override
+  void setup() {
+    formatters = DATE_FORMATS.map((s) => DateFormat(s, LOCALE));
+    data = DATES;
+  }
+}
+
+class DateBenchmarkReused extends Base {
+  DateBenchmarkReused() : super('DateFormat', 'reused');
+
+  @override
+  void setup() {
+    formatters = DATE_FORMATS.map((s) => DateFormat(s, LOCALE)).toList();
+    data = DATES;
+  }
+}
+
+class NumberBenchmark extends Base {
+  NumberBenchmark() : super('NumberFormat', 'oneshot');
+
+  @override
+  void setup() {
+    formatters = NUMBER_FORMATS.map((s) => NumberFormat(s, LOCALE));
+    data = NUMBERS;
+  }
+}
+
+class NumberBenchmarkReused extends Base {
+  NumberBenchmarkReused() : super('NumberFormat', 'reused');
+
+  @override
+  void setup() {
+    formatters = NUMBER_FORMATS.map((s) => NumberFormat(s, LOCALE)).toList();
+    data = NUMBERS;
+  }
+}
+
+void main() {
+  DateBenchmark().report();
+  DateBenchmarkReused().report();
+  NumberBenchmark().report();
+  NumberBenchmarkReused().report();
+
+  if (g is! String) throw 'Error';
+}