Benchmark: compare runInTransaction against runInTransactionAsync (#19)

Author: greenrobot-team

benchmark/bin/write.dart

@@ -1,4 +1,7 @@
+import 'dart:async';
+
 import 'package:objectbox_benchmark/benchmark.dart';
+import 'package:objectbox_benchmark/model.dart';
 import 'package:objectbox_benchmark/objectbox.g.dart';
 
 const count = 10000;
@@ -11,6 +14,8 @@ void main() async {
   await PutAsync2().report();
   await PutAsync3().report();
   await PutQueued().report();
+  await RunInTx().report();
+  await RunInTxAsync().report();
 }
 
 class Put extends DbBenchmark {
@@ -93,3 +98,29 @@ class PutQueued extends DbBenchmark {
     store.awaitAsyncSubmitted();
   }
 }
+
+class RunInTx extends DbBenchmark {
+  final items = prepareTestEntities(count, assignedIds: true);
+
+  RunInTx() : super('$RunInTx');
+
+  @override
+  void runIteration(int i) {
+    store.runInTransaction(TxMode.write, () => items.forEach(box.put));
+  }
+}
+
+class RunInTxAsync extends DbBenchmark {
+  final items = prepareTestEntities(count, assignedIds: true);
+
+  RunInTxAsync() : super('$RunInTxAsync');
+
+  @override
+  Future<void> runIteration(int iteration) {
+    return store.runInTransactionAsync(
+        TxMode.write,
+        (Store store, List<TestEntity> items) =>
+            items.forEach(store.box<TestEntity>().put),
+        items);
+  }
+}