WIP, not for submit: benchmark analyzer-based generation / incrementa…

…l generation by number of files.

_test/bin/benchmark.dart

@@ -0,0 +1,57 @@
+import 'dart:io';
+
+import '../test/common/utils.dart';
+
+Future<void> main() async {
+  // only works in test
+  inTest = false;
+  ensureCleanGitClient();
+  print('Initial build.');
+  await runBuild();
+  print('Done.');
+
+  print('Files,Build time/ms');
+  for (final size in [
+    100,
+    500,
+    1000,
+    1500,
+    2000,
+    2500,
+    3000,
+    3500,
+    4000,
+    4500,
+    5000,
+  ]) {
+    stdout.write('$size,');
+
+    for (var i = 0; i != size; ++i) {
+      await createFile('lib/built_value${i + 1}.dart', '''
+import 'package:built_value/built_value.dart';
+
+part 'built_value${i + 1}.g.dart';
+
+abstract class Value implements Built<Value, ValueBuilder> {
+  Value._();
+  factory Value([void Function(ValueBuilder)? updates]) = _\$Value;
+}
+''');
+    }
+    await runBuild();
+    await createFile('lib/built_value1.dart', '''
+import 'package:built_value/built_value.dart';
+
+part 'built_value1.g.dart';
+
+abstract class Value implements Built<Value, ValueBuilder> {
+  int get x;
+  Value._();
+  factory Value([void Function(ValueBuilder)? updates]) = _\$Value;
+}
+''');
+    final stopwatch = Stopwatch()..start();
+    await runBuild();
+    print(stopwatch.elapsedMilliseconds);
+  }
+}

_test/lib/built_value1.dart

@@ -0,0 +1,10 @@
+import 'package:built_value/built_value.dart';
+
+
+
+part 'built_value1.g.dart';
+
+abstract class Value implements Built<Value, ValueBuilder> {
+  Value._();
+  factory Value([void Function(ValueBuilder)? updates]) = _$Value;
+}

_test/pubspec.yaml

@@ -6,6 +6,7 @@ environment:
   sdk: ^3.6.0
 
 dependencies:
+  built_value: ^8.9.0
   web: ^1.0.0
 
 dev_dependencies:
@@ -18,6 +19,7 @@ dev_dependencies:
   build_runner_core: any
   build_test: any
   build_web_compilers: any
+  built_value_generator: ^8.9.0
   dart_flutter_team_lints: ^3.1.0
   io: ^1.0.0
   path: ^1.8.0

_test/test/common/utils.dart

@@ -11,6 +11,8 @@ import 'package:path/path.dart' as p;
 import 'package:test/test.dart';
 import 'package:test_process/test_process.dart';
 
+bool inTest = true;
+
 Directory _generatedDir = Directory(p.join(_toolDir.path, 'generated'));
 Directory _toolDir = Directory(p.join('.dart_tool', 'build'));
 
@@ -55,8 +57,8 @@ Future<ProcessResult> _runBuild(String command, List<String> args,
   }
 
   final result = await Process.run(command, args);
-  printOnFailure('${result.stdout}');
-  printOnFailure('${result.stderr}');
+  if (inTest) printOnFailure('${result.stdout}');
+  if (inTest) printOnFailure('${result.stderr}');
   return result;
 }
 
@@ -123,10 +125,14 @@ bool _gitIsClean() {
 /// state for this directory after running the test.
 void ensureCleanGitClient() {
   var gitWasClean = _gitIsClean();
-  expect(gitWasClean, isTrue,
+  if (inTest) {expect(gitWasClean, isTrue,
       reason: 'Not running on a clean git client, aborting test.\n');
+  } else {
+    if (!gitWasClean) throw 'Not running on a clean git client, aborting.';
+  }
+
 
-  addTearDown(_resetGitClient);
+  if (inTest) addTearDown(_resetGitClient);
 }
 
 Future<void> _resetGitClient() async {
@@ -216,7 +222,7 @@ Future<void> expectTestsPass(
 
 Future<void> createFile(String path, String contents) async {
   var file = File(path);
-  expect(await file.exists(), isFalse);
+  if (inTest) expect(await file.exists(), isFalse);
   await file.create(recursive: true);
   await file.writeAsString(contents);
 }