diff --git a/benchmarks/bin/from_binary.dart b/benchmarks/bin/from_binary.dart
index 71604a29..eadd871b 100644
--- a/benchmarks/bin/from_binary.dart
+++ b/benchmarks/bin/from_binary.dart
@@ -11,6 +11,11 @@ import 'package:protobuf_benchmarks/generated/google_message1_proto3.pb.dart'
     as p3;
 import 'package:protobuf_benchmarks/generated/google_message2.pb.dart';
 import 'package:protobuf_benchmarks/readfile.dart';
+import 'package:protobuf/protobuf.dart';
+
+GeneratedMessage? sink1;
+GeneratedMessage? sink2;
+GeneratedMessage? sink3;
 
 class Benchmark extends BenchmarkBase {
   final Uint8List _message1Proto2Input;
@@ -28,9 +33,9 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    p2.GoogleMessage1.fromBuffer(_message1Proto2Input);
-    p3.GoogleMessage1.fromBuffer(_message1Proto3Input);
-    GoogleMessage2.fromBuffer(_message2Input);
+    sink1 = p2.GoogleMessage1.fromBuffer(_message1Proto2Input);
+    sink2 = p3.GoogleMessage1.fromBuffer(_message1Proto3Input);
+    sink3 = GoogleMessage2.fromBuffer(_message2Input);
   }
 }
 
@@ -48,4 +53,10 @@ void main() {
     message1Proto3Input,
     message2Input,
   ).report();
+
+  if (int.parse('1') == 0) {
+    print(sink1);
+    print(sink2);
+    print(sink3);
+  }
 }
diff --git a/benchmarks/bin/from_json_string.dart b/benchmarks/bin/from_json_string.dart
index 67ec2dd0..f153c27a 100644
--- a/benchmarks/bin/from_json_string.dart
+++ b/benchmarks/bin/from_json_string.dart
@@ -9,6 +9,11 @@ import 'package:protobuf_benchmarks/generated/google_message1_proto3.pb.dart'
     as p3;
 import 'package:protobuf_benchmarks/generated/google_message2.pb.dart';
 import 'package:protobuf_benchmarks/readfile.dart';
+import 'package:protobuf/protobuf.dart';
+
+GeneratedMessage? sink1;
+GeneratedMessage? sink2;
+GeneratedMessage? sink3;
 
 class Benchmark extends BenchmarkBase {
   final String _message1Proto2JsonString;
@@ -29,9 +34,9 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    p2.GoogleMessage1.fromJson(_message1Proto2JsonString);
-    p3.GoogleMessage1.fromJson(_message1Proto3JsonString);
-    GoogleMessage2.fromJson(_message2JsonString);
+    sink1 = p2.GoogleMessage1.fromJson(_message1Proto2JsonString);
+    sink2 = p3.GoogleMessage1.fromJson(_message1Proto3JsonString);
+    sink3 = GoogleMessage2.fromJson(_message2JsonString);
   }
 }
 
@@ -49,4 +54,10 @@ void main() {
     message1Proto3Input,
     message2Input,
   ).report();
+
+  if (int.parse('1') == 0) {
+    print(sink1);
+    print(sink2);
+    print(sink3);
+  }
 }
diff --git a/benchmarks/bin/from_proto3_json_object.dart b/benchmarks/bin/from_proto3_json_object.dart
index 7c30875a..f39a2dbb 100644
--- a/benchmarks/bin/from_proto3_json_object.dart
+++ b/benchmarks/bin/from_proto3_json_object.dart
@@ -9,6 +9,11 @@ import 'package:protobuf_benchmarks/generated/google_message1_proto3.pb.dart'
     as p3;
 import 'package:protobuf_benchmarks/generated/google_message2.pb.dart';
 import 'package:protobuf_benchmarks/readfile.dart';
+import 'package:protobuf/protobuf.dart';
+
+GeneratedMessage? sink1;
+GeneratedMessage? sink2;
+GeneratedMessage? sink3;
 
 class Benchmark extends BenchmarkBase {
   final Object? _message1Proto2Proto3JsonObject;
@@ -29,13 +34,14 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    p2.GoogleMessage1.create().mergeFromProto3Json(
-      _message1Proto2Proto3JsonObject,
-    );
-    p3.GoogleMessage1.create().mergeFromProto3Json(
-      _message1Proto3Proto3JsonObject,
-    );
-    GoogleMessage2.create().mergeFromProto3Json(_message2Proto3JsonObject);
+    sink1 =
+        p2.GoogleMessage1.create()
+          ..mergeFromProto3Json(_message1Proto2Proto3JsonObject);
+    sink2 =
+        p3.GoogleMessage1.create()
+          ..mergeFromProto3Json(_message1Proto3Proto3JsonObject);
+    sink3 =
+        GoogleMessage2.create()..mergeFromProto3Json(_message2Proto3JsonObject);
   }
 }
 
@@ -53,4 +59,10 @@ void main() {
     message1Proto3Input,
     message2Input,
   ).report();
+
+  if (int.parse('1') == 0) {
+    print(sink1);
+    print(sink2);
+    print(sink3);
+  }
 }
diff --git a/benchmarks/bin/from_proto3_json_string.dart b/benchmarks/bin/from_proto3_json_string.dart
index a8b83b7c..84afb98c 100644
--- a/benchmarks/bin/from_proto3_json_string.dart
+++ b/benchmarks/bin/from_proto3_json_string.dart
@@ -11,6 +11,11 @@ import 'package:protobuf_benchmarks/generated/google_message1_proto3.pb.dart'
     as p3;
 import 'package:protobuf_benchmarks/generated/google_message2.pb.dart';
 import 'package:protobuf_benchmarks/readfile.dart';
+import 'package:protobuf/protobuf.dart';
+
+GeneratedMessage? sink1;
+GeneratedMessage? sink2;
+GeneratedMessage? sink3;
 
 class Benchmark extends BenchmarkBase {
   final String _message1Proto2Proto3JsonString;
@@ -34,15 +39,15 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    p2.GoogleMessage1.create().mergeFromProto3Json(
-      jsonDecode(_message1Proto2Proto3JsonString),
-    );
-    p3.GoogleMessage1.create().mergeFromProto3Json(
-      jsonDecode(_message1Proto3Proto3JsonString),
-    );
-    GoogleMessage2.create().mergeFromProto3Json(
-      jsonDecode(_message2Proto3JsonString),
-    );
+    sink1 =
+        p2.GoogleMessage1.create()
+          ..mergeFromProto3Json(jsonDecode(_message1Proto2Proto3JsonString));
+    sink2 =
+        p3.GoogleMessage1.create()
+          ..mergeFromProto3Json(jsonDecode(_message1Proto3Proto3JsonString));
+    sink3 =
+        GoogleMessage2.create()
+          ..mergeFromProto3Json(jsonDecode(_message2Proto3JsonString));
   }
 }
 
@@ -60,4 +65,10 @@ void main() {
     message1Proto3Input,
     message2Input,
   ).report();
+
+  if (int.parse('1') == 0) {
+    print(sink1);
+    print(sink2);
+    print(sink3);
+  }
 }
diff --git a/benchmarks/bin/hash_code.dart b/benchmarks/bin/hash_code.dart
index b2465f4f..12274b4f 100644
--- a/benchmarks/bin/hash_code.dart
+++ b/benchmarks/bin/hash_code.dart
@@ -10,6 +10,10 @@ import 'package:protobuf_benchmarks/generated/google_message1_proto3.pb.dart'
 import 'package:protobuf_benchmarks/generated/google_message2.pb.dart';
 import 'package:protobuf_benchmarks/readfile.dart';
 
+int sink1 = 0;
+int sink2 = 0;
+int sink3 = 0;
+
 class Benchmark extends BenchmarkBase {
   final p2.GoogleMessage1 _message1Proto2;
   final p3.GoogleMessage1 _message1Proto3;
@@ -26,9 +30,9 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    _message1Proto2.hashCode;
-    _message1Proto3.hashCode;
-    _message2.hashCode;
+    sink1 = _message1Proto2.hashCode;
+    sink2 = _message1Proto3.hashCode;
+    sink3 = _message2.hashCode;
   }
 }
 
@@ -46,4 +50,10 @@ void main() {
     message1Proto3Input,
     message2Input,
   ).report();
+
+  if (int.parse('1') == 0) {
+    print(sink1);
+    print(sink2);
+    print(sink3);
+  }
 }
diff --git a/benchmarks/bin/query_decode_binary.dart b/benchmarks/bin/query_decode_binary.dart
index eb7332d0..b2038707 100644
--- a/benchmarks/bin/query_decode_binary.dart
+++ b/benchmarks/bin/query_decode_binary.dart
@@ -5,6 +5,9 @@
 import 'package:protobuf_benchmarks/benchmark_base.dart';
 import 'package:protobuf_benchmarks/generated/f0.pb.dart' as f0;
 import 'package:protobuf_benchmarks/readfile.dart';
+import 'package:protobuf/protobuf.dart';
+
+GeneratedMessage? sink;
 
 class Benchmark extends BenchmarkBase {
   final List<int> _input;
@@ -13,11 +16,15 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    f0.A0.fromBuffer(_input);
+    sink = f0.A0.fromBuffer(_input);
   }
 }
 
 void main() {
   final List<int> encoded = readfile('datasets/query_benchmark.pb');
   Benchmark('query_decode_binary', encoded).report();
+
+  if (int.parse('1') == 0) {
+    print(sink);
+  }
 }
diff --git a/benchmarks/bin/query_decode_json.dart b/benchmarks/bin/query_decode_json.dart
index 0db0a135..deff2d84 100644
--- a/benchmarks/bin/query_decode_json.dart
+++ b/benchmarks/bin/query_decode_json.dart
@@ -5,6 +5,9 @@
 import 'package:protobuf_benchmarks/benchmark_base.dart';
 import 'package:protobuf_benchmarks/generated/f0.pb.dart' as f0;
 import 'package:protobuf_benchmarks/readfile.dart';
+import 'package:protobuf/protobuf.dart';
+
+GeneratedMessage? sink;
 
 class Benchmark extends BenchmarkBase {
   final String _input;
@@ -14,11 +17,15 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    f0.A0.fromJson(_input);
+    sink = f0.A0.fromJson(_input);
   }
 }
 
 void main() {
   final List<int> encoded = readfile('datasets/query_benchmark.pb');
   Benchmark('query_decode_json', encoded).report();
+
+  if (int.parse('1') == 0) {
+    print(sink);
+  }
 }
diff --git a/benchmarks/bin/query_encode_binary.dart b/benchmarks/bin/query_encode_binary.dart
index 110febcf..33aa54ba 100644
--- a/benchmarks/bin/query_encode_binary.dart
+++ b/benchmarks/bin/query_encode_binary.dart
@@ -6,6 +6,10 @@ import 'package:protobuf_benchmarks/benchmark_base.dart';
 import 'package:protobuf_benchmarks/generated/f0.pb.dart' as f0;
 import 'package:protobuf_benchmarks/readfile.dart';
 
+import 'dart:typed_data';
+
+Uint8List? sink;
+
 class Benchmark extends BenchmarkBase {
   final f0.A0 _input;
 
@@ -13,11 +17,15 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    _input.writeToBuffer();
+    sink = _input.writeToBuffer();
   }
 }
 
 void main() {
   final List<int> encoded = readfile('datasets/query_benchmark.pb');
   Benchmark('query_encode_binary', encoded).report();
+
+  if (int.parse('1') == 0) {
+    print(sink);
+  }
 }
diff --git a/benchmarks/bin/query_encode_json.dart b/benchmarks/bin/query_encode_json.dart
index 7a4e9772..f43ae1be 100644
--- a/benchmarks/bin/query_encode_json.dart
+++ b/benchmarks/bin/query_encode_json.dart
@@ -6,6 +6,8 @@ import 'package:protobuf_benchmarks/benchmark_base.dart';
 import 'package:protobuf_benchmarks/generated/f0.pb.dart' as f0;
 import 'package:protobuf_benchmarks/readfile.dart';
 
+String? sink;
+
 class Benchmark extends BenchmarkBase {
   final f0.A0 _input;
 
@@ -13,11 +15,15 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    _input.writeToJson();
+    sink = _input.writeToJson();
   }
 }
 
 void main() {
   final List<int> encoded = readfile('datasets/query_benchmark.pb');
   Benchmark('query_encode_json', encoded).report();
+
+  if (int.parse('1') == 0) {
+    print(sink);
+  }
 }
diff --git a/benchmarks/bin/query_set_nested_value.dart b/benchmarks/bin/query_set_nested_value.dart
index 4cfb46d6..28f03e90 100644
--- a/benchmarks/bin/query_set_nested_value.dart
+++ b/benchmarks/bin/query_set_nested_value.dart
@@ -9,6 +9,8 @@ import 'package:protobuf_benchmarks/generated/f19.pb.dart' as f19;
 import 'package:protobuf_benchmarks/generated/f2.pb.dart' as f2;
 import 'package:protobuf_benchmarks/readfile.dart';
 
+GeneratedMessage? sink;
+
 class Benchmark extends BenchmarkBase {
   final f0.A0 _input;
 
@@ -17,8 +19,7 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    // ignore: unused_result
-    _input.rebuild((f0.A0 a0Builder) {
+    sink = _input.rebuild((f0.A0 a0Builder) {
       a0Builder.a4.last = a0Builder.a4.last.rebuild((f2.A1 a1builder) {
         a1builder.a378 = a1builder.a378.rebuild(
           (f19.A220 a220builder) => a220builder.a234 = 'new_value',
@@ -31,4 +32,8 @@ class Benchmark extends BenchmarkBase {
 void main() {
   final List<int> encoded = readfile('datasets/query_benchmark.pb');
   Benchmark('query_set_nested_value', encoded).report();
+
+  if (int.parse('1') == 0) {
+    print(sink);
+  }
 }
diff --git a/benchmarks/bin/repeated_field.dart b/benchmarks/bin/repeated_field.dart
index 2aa42c2a..c3c75b1a 100644
--- a/benchmarks/bin/repeated_field.dart
+++ b/benchmarks/bin/repeated_field.dart
@@ -8,6 +8,9 @@ import 'package:fixnum/fixnum.dart';
 import 'package:protobuf_benchmarks/benchmark_base.dart';
 import 'package:protobuf_benchmarks/generated/f12.pb.dart' as f12;
 import 'package:protobuf_benchmarks/generated/google_message2.pb.dart';
+import 'package:protobuf/protobuf.dart';
+
+GeneratedMessage? sink;
 
 class RepeatedBenchmark extends BenchmarkBase {
   final Uint8List _buffer;
@@ -16,7 +19,9 @@ class RepeatedBenchmark extends BenchmarkBase {
     : _buffer = message.writeToBuffer();
 
   @override
-  void run() => GoogleMessage2.fromBuffer(_buffer);
+  void run() {
+    sink = GoogleMessage2.fromBuffer(_buffer);
+  }
 }
 
 class RepeatedEnumBenchmark extends BenchmarkBase {
@@ -26,7 +31,9 @@ class RepeatedEnumBenchmark extends BenchmarkBase {
     : _buffer = message.writeToBuffer();
 
   @override
-  void run() => f12.A58.fromBuffer(_buffer);
+  void run() {
+    sink = f12.A58.fromBuffer(_buffer);
+  }
 }
 
 void main() {
@@ -46,4 +53,8 @@ void main() {
     'repeated_enum',
     f12.A58(a306: List<f12.A322>.generate(kSize, (_) => f12.A322.A324)),
   ).report();
+
+  if (int.parse('1') == 0) {
+    print(sink);
+  }
 }
diff --git a/benchmarks/bin/to_binary.dart b/benchmarks/bin/to_binary.dart
index 214e7b4b..9fc0accd 100644
--- a/benchmarks/bin/to_binary.dart
+++ b/benchmarks/bin/to_binary.dart
@@ -10,6 +10,12 @@ import 'package:protobuf_benchmarks/generated/google_message1_proto3.pb.dart'
 import 'package:protobuf_benchmarks/generated/google_message2.pb.dart';
 import 'package:protobuf_benchmarks/readfile.dart';
 
+import 'dart:typed_data';
+
+Uint8List? sink1;
+Uint8List? sink2;
+Uint8List? sink3;
+
 class Benchmark extends BenchmarkBase {
   final p2.GoogleMessage1 _message1Proto2;
   final p3.GoogleMessage1 _message1Proto3;
@@ -26,9 +32,9 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    _message1Proto2.writeToBuffer();
-    _message1Proto3.writeToBuffer();
-    _message2.writeToBuffer();
+    sink1 = _message1Proto2.writeToBuffer();
+    sink2 = _message1Proto3.writeToBuffer();
+    sink3 = _message2.writeToBuffer();
   }
 }
 
@@ -46,4 +52,10 @@ void main() {
     message1Proto3Input,
     message2Input,
   ).report();
+
+  if (int.parse('1') == 0) {
+    print(sink1);
+    print(sink2);
+    print(sink3);
+  }
 }
diff --git a/benchmarks/bin/to_json_string.dart b/benchmarks/bin/to_json_string.dart
index 4d7ba9e7..150f0305 100644
--- a/benchmarks/bin/to_json_string.dart
+++ b/benchmarks/bin/to_json_string.dart
@@ -10,6 +10,10 @@ import 'package:protobuf_benchmarks/generated/google_message1_proto3.pb.dart'
 import 'package:protobuf_benchmarks/generated/google_message2.pb.dart';
 import 'package:protobuf_benchmarks/readfile.dart';
 
+String? sink1;
+String? sink2;
+String? sink3;
+
 class Benchmark extends BenchmarkBase {
   final p2.GoogleMessage1 _message1Proto2;
   final p3.GoogleMessage1 _message1Proto3;
@@ -26,9 +30,9 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    _message1Proto2.writeToJson();
-    _message1Proto3.writeToJson();
-    _message2.writeToJson();
+    sink1 = _message1Proto2.writeToJson();
+    sink2 = _message1Proto3.writeToJson();
+    sink3 = _message2.writeToJson();
   }
 }
 
@@ -46,4 +50,10 @@ void main() {
     message1Proto3Input,
     message2Input,
   ).report();
+
+  if (int.parse('1') == 0) {
+    print(sink1);
+    print(sink2);
+    print(sink3);
+  }
 }
diff --git a/benchmarks/bin/to_proto3_json_object.dart b/benchmarks/bin/to_proto3_json_object.dart
index 806f5d6b..11280e76 100644
--- a/benchmarks/bin/to_proto3_json_object.dart
+++ b/benchmarks/bin/to_proto3_json_object.dart
@@ -10,6 +10,10 @@ import 'package:protobuf_benchmarks/generated/google_message1_proto3.pb.dart'
 import 'package:protobuf_benchmarks/generated/google_message2.pb.dart';
 import 'package:protobuf_benchmarks/readfile.dart';
 
+Object? sink1;
+Object? sink2;
+Object? sink3;
+
 class Benchmark extends BenchmarkBase {
   final p2.GoogleMessage1 _message1Proto2;
   final p3.GoogleMessage1 _message1Proto3;
@@ -26,9 +30,9 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    _message1Proto2.toProto3Json();
-    _message1Proto3.toProto3Json();
-    _message2.toProto3Json();
+    sink1 = _message1Proto2.toProto3Json();
+    sink2 = _message1Proto3.toProto3Json();
+    sink3 = _message2.toProto3Json();
   }
 }
 
@@ -46,4 +50,10 @@ void main() {
     message1Proto3Input,
     message2Input,
   ).report();
+
+  if (int.parse('1') == 0) {
+    print(sink1);
+    print(sink2);
+    print(sink3);
+  }
 }
diff --git a/benchmarks/bin/to_proto3_json_string.dart b/benchmarks/bin/to_proto3_json_string.dart
index 689c0b05..8ec59b33 100644
--- a/benchmarks/bin/to_proto3_json_string.dart
+++ b/benchmarks/bin/to_proto3_json_string.dart
@@ -12,6 +12,10 @@ import 'package:protobuf_benchmarks/generated/google_message1_proto3.pb.dart'
 import 'package:protobuf_benchmarks/generated/google_message2.pb.dart';
 import 'package:protobuf_benchmarks/readfile.dart';
 
+String? sink1;
+String? sink2;
+String? sink3;
+
 class Benchmark extends BenchmarkBase {
   final p2.GoogleMessage1 _message1Proto2;
   final p3.GoogleMessage1 _message1Proto3;
@@ -28,9 +32,9 @@ class Benchmark extends BenchmarkBase {
 
   @override
   void run() {
-    jsonEncode(_message1Proto2.toProto3Json());
-    jsonEncode(_message1Proto3.toProto3Json());
-    jsonEncode(_message2.toProto3Json());
+    sink1 = jsonEncode(_message1Proto2.toProto3Json());
+    sink2 = jsonEncode(_message1Proto3.toProto3Json());
+    sink3 = jsonEncode(_message2.toProto3Json());
   }
 }
 
@@ -48,4 +52,10 @@ void main() {
     message1Proto3Input,
     message2Input,
   ).report();
+
+  if (int.parse('1') == 0) {
+    print(sink1);
+    print(sink2);
+    print(sink3);
+  }
 }