diff --git a/DEPS b/DEPS
index 660bf21381a..6295d9e9d40 100644
--- a/DEPS
+++ b/DEPS
@@ -55,7 +55,7 @@ vars = {
   "co19_2_rev": "ae846ed2a987a2d2dbe4b9e9c68448a21f91ef5b",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal
-  "benchmarks_internal_rev": "599aa474a03c37be146f82dfbad85f34f25ffa47",
+  "benchmarks_internal_rev": "a72da9eed591014535eb47d81185deca39e65ef5",
   "checkout_benchmarks_internal": False,
 
   # Checkout Android dependencies only on Mac and Linux.
diff --git a/benchmarks/MD5/dart2/md5.dart b/benchmarks/MD5/dart2/md5.dart
index ab0e2d2e046..e73b901c62d 100644
--- a/benchmarks/MD5/dart2/md5.dart
+++ b/benchmarks/MD5/dart2/md5.dart
@@ -15,7 +15,7 @@ class MD5Bench extends BenchmarkBase {
   List<int> data;
 
   MD5Bench() : super('MD5') {
-    data = List<int>(size);
+    data = List<int>.filled(size, null);
     for (int i = 0; i < data.length; i++) {
       data[i] = i % 256;
     }
diff --git a/benchmarks/Richards/dart2/Richards.dart b/benchmarks/Richards/dart2/Richards.dart
index 0cb0a1a0107..5e74efe4f2e 100644
--- a/benchmarks/Richards/dart2/Richards.dart
+++ b/benchmarks/Richards/dart2/Richards.dart
@@ -117,7 +117,7 @@ class Scheduler {
   int currentId;
   TaskControlBlock list;
   List<TaskControlBlock> blocks =
-      List<TaskControlBlock>(Richards.NUMBER_OF_IDS);
+      List<TaskControlBlock>.filled(Richards.NUMBER_OF_IDS, null);
 
   /// Add an idle task to this scheduler.
   void addIdleTask(int id, int priority, Packet queue, int count) {
@@ -428,7 +428,7 @@ class Packet {
   int kind; // The type of this packet.
   int a1 = 0;
 
-  List<int> a2 = List(Richards.DATA_SIZE);
+  List<int> a2 = List.filled(Richards.DATA_SIZE, null);
 
   Packet(this.link, this.id, this.kind);
 
diff --git a/benchmarks/SHA1/dart2/sha1.dart b/benchmarks/SHA1/dart2/sha1.dart
index 6c5c95af0cc..0b7128faf78 100644
--- a/benchmarks/SHA1/dart2/sha1.dart
+++ b/benchmarks/SHA1/dart2/sha1.dart
@@ -15,7 +15,7 @@ class SHA1Bench extends BenchmarkBase {
   List<int> data;
 
   SHA1Bench() : super('SHA1') {
-    data = List<int>(size);
+    data = List<int>.filled(size, null);
     for (int i = 0; i < data.length; i++) {
       data[i] = i % 256;
     }
diff --git a/benchmarks/SHA256/dart2/sha256.dart b/benchmarks/SHA256/dart2/sha256.dart
index dd3cae6ec94..e381dc0cf82 100644
--- a/benchmarks/SHA256/dart2/sha256.dart
+++ b/benchmarks/SHA256/dart2/sha256.dart
@@ -16,7 +16,7 @@ class SHA256Bench extends BenchmarkBase {
   List<int> data;
 
   SHA256Bench() : super('SHA256') {
-    data = List<int>(size);
+    data = List<int>.filled(size, null);
     for (int i = 0; i < data.length; i++) {
       data[i] = i % 256;
     }
diff --git a/benchmarks/Utf8Encode/dart2/Utf8Encode.dart b/benchmarks/Utf8Encode/dart2/Utf8Encode.dart
index 7bfaffbadbf..422756fe28e 100644
--- a/benchmarks/Utf8Encode/dart2/Utf8Encode.dart
+++ b/benchmarks/Utf8Encode/dart2/Utf8Encode.dart
@@ -45,7 +45,7 @@ class Utf8Encode extends BenchmarkBase {
     final String repeatedText = originalText * (size / nRunes).ceil();
     final List<int> runes = repeatedText.runes.toList();
     final int nChunks = (size < nRunes) ? (nRunes / size).floor() : 1;
-    benchmarkTextChunks = List<String>(nChunks);
+    benchmarkTextChunks = List<String>.filled(nChunks, null);
     for (int i = 0; i < nChunks; i++) {
       final offset = i * size;
       benchmarkTextChunks[i] =