diff --git a/benchmarks/MemoryCopy/dart/MemoryCopy.dart b/benchmarks/MemoryCopy/dart/MemoryCopy.dart
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+++ b/benchmarks/MemoryCopy/dart/MemoryCopy.dart
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+// Copyright (c) 2023, 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 copying typed data lists.
+
+import 'dart:ffi';
+import 'dart:math';
+import 'dart:typed_data';
+
+import 'package:args/args.dart';
+import 'package:ffi/ffi.dart';
+
+const maxSizeInBytes = 10 * 1024 * 1024;
+
+// A modified version of BenchmarkBase from package:benchmark_harness where
+// - the run() method takes a number of rounds, so that there is only one run()
+//   call per measurement and thus the overhead of calling the run() method is
+//   the same across subclass results.
+// - the measureFor() method returns the number of bytes transfered per second,
+//   not the number of microseconds per iteration (round).
+abstract class MemoryCopyBenchmark {
+  final String name;
+  final int bytes;
+
+  MemoryCopyBenchmark(String name, this.bytes) : name = 'MemoryCopy.$name';
+
+  static const targetBatchSizeInBytes = 32 * 1024;
+
+  // Returns the number of bytes copied per second.
+  double measureFor(Duration minDuration) {
+    // The logic below is based off of BenchmarkBase._measureForImpl.
+    // We can't use BenchmarkBase.measureFor directly, because
+    // * it calls the function in a loop instead of passing the number of
+    //   desired iterations to the function being called. Here, method
+    //   invocation would dominate the actual body for small byte counts.
+    // * it doesn't provide the caller with the number of iterations performed,
+    //   which we need to calculate the number of bytes transferred.
+
+    // Start off with enough rounds to ensure a minimum number of bytes copied
+    // per run() invocation.
+    int rounds = max(targetBatchSizeInBytes ~/ bytes, 1);
+
+    // If running a long measurement permit some amount of measurement jitter
+    // to avoid discarding results that almost, but not quite, reach the minimum
+    // duration requested.
+    final allowedJitter = Duration(
+        microseconds: minDuration.inSeconds > 0
+            ? (minDuration.inMicroseconds * 0.1).floor()
+            : 0);
+
+    final watch = Stopwatch()..start();
+    while (true) {
+      // Try running for the current number of rounds and see if that reaches
+      // the minimum duration requested, so we only get the elapsed time from
+      // the StopWatch once for the final results used.
+      watch.reset();
+      run(rounds);
+      final elapsed = watch.elapsed;
+      final numberOfBytesCopied = rounds * bytes;
+      if (elapsed >= (minDuration - allowedJitter)) {
+        return (numberOfBytesCopied / elapsed.inMicroseconds) *
+            Duration.microsecondsPerSecond;
+      }
+      // If not, then adjust our estimate of how many iterations are needed to
+      // reach the minimum and try again.
+      rounds *= (minDuration.inMicroseconds / elapsed.inMicroseconds).ceil();
+    }
+  }
+
+  static final kValueRegexp = RegExp(r'^([0-9]+)');
+  static final kMaxLabelLength =
+      'MemoryCopy.1048576.setRange.TypedData.Double(NanosecondsPerChar)'.length;
+  // Maximum expected number of digits on either side of the decimal point.
+  static final kMaxDigits = 16;
+
+  double measure() {
+    setup();
+
+    // Warmup for 100 ms.
+    measureFor(const Duration(milliseconds: 100));
+
+    // Run benchmark for 1 second.
+    final double result = measureFor(const Duration(seconds: 1));
+
+    teardown();
+    return result;
+  }
+
+  void report({bool verbose = false, bool aligned = false}) {
+    final bytesPerSecond = measure();
+
+    void printLine(String label, String content) {
+      String contentPadding = ' ';
+      if (aligned) {
+        final matches = kValueRegexp.firstMatch(content)!;
+        final contentPaddingLength = 1 +
+            (kMaxLabelLength - label.length) +
+            max<int>(kMaxDigits - matches[1]!.length, 0);
+        contentPadding = ' ' * contentPaddingLength;
+      }
+      print('$label:$contentPadding$content');
+    }
+
+    printLine('$name(BytesPerSecond)', '$bytesPerSecond');
+    if (verbose) {
+      const nanoSecondsPerSecond = 1000 * 1000 * 1000;
+      final nanosecondsPerByte = nanoSecondsPerSecond / bytesPerSecond;
+      printLine('$name(NanosecondsPerChar)', '$nanosecondsPerByte');
+      const bytesPerMebibyte = 1024 * 1024;
+      final mibPerSecond = bytesPerSecond / bytesPerMebibyte;
+      printLine('$name(MebibytesPerSecond)', '$mibPerSecond');
+    }
+  }
+
+  void setup();
+  void teardown();
+  void run(int rounds);
+}
+
+abstract class Uint8ListCopyBenchmark extends MemoryCopyBenchmark {
+  final int count;
+  late Uint8List input;
+  late Uint8List result;
+
+  Uint8ListCopyBenchmark(String method, int bytes)
+      : count = bytes,
+        super('$bytes.$method.TypedData.Uint8', bytes);
+
+  @override
+  void setup() {
+    input = Uint8List(count);
+    for (int i = 0; i < count; ++i) {
+      input[i] = (i + 3) & 0xff;
+    }
+    result = Uint8List(maxSizeInBytes);
+  }
+
+  @override
+  void teardown() {
+    for (int i = 0; i < count; ++i) {
+      final expected = (i + 3) & 0xff;
+      if (result[i] != expected) {
+        throw 'Expected result[$i] = $expected, got ${result[i]}';
+      }
+    }
+    final expected = 0;
+    for (int i = count; i < maxSizeInBytes; ++i) {
+      if (result[i] != expected) {
+        throw 'Expected result[$i] = $expected, got ${result[i]}';
+      }
+    }
+  }
+}
+
+class Uint8ListCopyViaLoopBenchmark extends Uint8ListCopyBenchmark {
+  Uint8ListCopyViaLoopBenchmark(int bytes) : super('loop', bytes);
+
+  @override
+  void run(int rounds) {
+    final count = this.count;
+    final input = this.input;
+    final result = this.result;
+    for (int r = 0; r < rounds; r++) {
+      for (int i = 0; i < count; i++) {
+        result[i] = input[i];
+      }
+    }
+  }
+}
+
+class Uint8ListCopyViaSetRangeBenchmark extends Uint8ListCopyBenchmark {
+  Uint8ListCopyViaSetRangeBenchmark(int bytes) : super('setRange', bytes);
+
+  @override
+  void run(int rounds) {
+    for (int r = 0; r < rounds; r++) {
+      result.setRange(0, count, input);
+    }
+  }
+}
+
+abstract class Float64ListCopyBenchmark extends MemoryCopyBenchmark {
+  final int count;
+  late Float64List input;
+  late Float64List result;
+
+  Float64ListCopyBenchmark(String method, int bytes)
+      : count = bytes ~/ 8,
+        super('$bytes.$method.TypedData.Double', bytes);
+
+  static const maxSizeInElements = maxSizeInBytes ~/ 8;
+
+  @override
+  void setup() {
+    input = Float64List(count);
+    for (int i = 0; i < count; ++i) {
+      input[i] = (i - 7).toDouble();
+    }
+    result = Float64List(maxSizeInElements);
+  }
+
+  @override
+  void teardown() {
+    for (int i = 0; i < count; ++i) {
+      final expected = (i - 7).toDouble();
+      if (result[i] != expected) {
+        throw 'Expected result[$i] = $expected, got ${result[i]}';
+      }
+    }
+    final expected = 0.0;
+    for (int i = count; i < maxSizeInElements; ++i) {
+      if (result[i] != expected) {
+        throw 'Expected result[$i] = $expected, got ${result[i]}';
+      }
+    }
+  }
+}
+
+class Float64ListCopyViaLoopBenchmark extends Float64ListCopyBenchmark {
+  Float64ListCopyViaLoopBenchmark(int bytes) : super('loop', bytes);
+
+  @override
+  void run(int rounds) {
+    final count = this.count;
+    final input = this.input;
+    final result = this.result;
+    for (int r = 0; r < rounds; r++) {
+      for (int i = 0; i < count; i++) {
+        result[i] = input[i];
+      }
+    }
+  }
+}
+
+class Float64ListCopyViaSetRangeBenchmark extends Float64ListCopyBenchmark {
+  Float64ListCopyViaSetRangeBenchmark(int bytes) : super('setRange', bytes);
+
+  @override
+  void run(int rounds) {
+    for (int r = 0; r < rounds; r++) {
+      result.setRange(0, count, input);
+    }
+  }
+}
+
+abstract class PointerUint8CopyBenchmark extends MemoryCopyBenchmark {
+  final int count;
+  late Pointer<Uint8> input;
+  late Pointer<Uint8> result;
+
+  PointerUint8CopyBenchmark(String method, int bytes)
+      : count = bytes,
+        super('$bytes.$method.Pointer.Uint8', bytes);
+
+  @override
+  void setup() {
+    input = malloc<Uint8>(count);
+    for (var i = 0; i < count; ++i) {
+      input[i] = (i + 3) & 0xff;
+    }
+    result = calloc<Uint8>(maxSizeInBytes);
+  }
+
+  @override
+  void teardown() {
+    malloc.free(input);
+    for (var i = 0; i < count; ++i) {
+      final expected = (i + 3) & 0xff;
+      if (result[i] != expected) {
+        throw 'Expected result[$i] = $expected, got ${result[i]}';
+      }
+    }
+    final expected = 0;
+    for (var i = count; i < maxSizeInBytes; ++i) {
+      if (result[i] != expected) {
+        throw 'Expected result[$i] = $expected, got ${result[i]}';
+      }
+    }
+    calloc.free(result);
+  }
+}
+
+class PointerUint8CopyViaLoopBenchmark extends PointerUint8CopyBenchmark {
+  PointerUint8CopyViaLoopBenchmark(int bytes) : super('loop', bytes);
+
+  @override
+  void run(int rounds) {
+    // Compare the setRange version to looping using Pointer.[]/Pointer.[]=.
+    final count = this.count;
+    final input = this.input;
+    final result = this.result;
+    for (int r = 0; r < rounds; r++) {
+      for (int i = 0; i < count; i++) {
+        result[i] = input[i];
+      }
+    }
+  }
+}
+
+class PointerUint8CopyViaSetRangeBenchmark extends PointerUint8CopyBenchmark {
+  PointerUint8CopyViaSetRangeBenchmark(int bytes) : super('setRange', bytes);
+
+  @override
+  void run(int rounds) {
+    for (int r = 0; r < rounds; r++) {
+      result
+          .asTypedList(maxSizeInBytes)
+          .setRange(0, count, input.asTypedList(count));
+    }
+  }
+}
+
+@Native<Void Function(Pointer<Void>, Pointer<Void>, Size)>(isLeaf: true)
+external void memcpy(Pointer<Void> to, Pointer<Void> from, int size);
+
+class PointerUint8CopyViaMemcpyBenchmark extends PointerUint8CopyBenchmark {
+  PointerUint8CopyViaMemcpyBenchmark(int bytes) : super('memcpy', bytes);
+
+  @override
+  void run(int rounds) {
+    for (int r = 0; r < rounds; r++) {
+      memcpy(result.cast(), input.cast(), count);
+    }
+  }
+}
+
+abstract class PointerDoubleCopyBenchmark extends MemoryCopyBenchmark {
+  final int count;
+  late Pointer<Double> input;
+  late Pointer<Double> result;
+
+  PointerDoubleCopyBenchmark(String method, int bytes)
+      : count = bytes ~/ 8,
+        super('$bytes.$method.Pointer.Double', bytes);
+
+  static const maxSizeInElements = maxSizeInBytes ~/ 8;
+
+  @override
+  void setup() {
+    input = malloc<Double>(count);
+    for (var i = 0; i < count; ++i) {
+      input[i] = (i - 7).toDouble();
+    }
+    result = calloc<Double>(maxSizeInElements);
+  }
+
+  @override
+  void teardown() {
+    malloc.free(input);
+    for (var i = 0; i < count; ++i) {
+      final expected = (i - 7).toDouble();
+      if (result[i] != expected) {
+        throw 'Expected result[$i] = $expected, got ${result[i]}';
+      }
+    }
+    final expected = 0.0;
+    for (var i = count; i < maxSizeInElements; ++i) {
+      if (result[i] != expected) {
+        throw 'Expected result[$i] = $expected, got ${result[i]}';
+      }
+    }
+    calloc.free(result);
+  }
+}
+
+class PointerDoubleCopyViaLoopBenchmark extends PointerDoubleCopyBenchmark {
+  PointerDoubleCopyViaLoopBenchmark(int bytes) : super('loop', bytes);
+
+  @override
+  void run(int rounds) {
+    // Compare the setRange version to looping using Pointer.[]/Pointer.[]=.
+    final count = this.count;
+    final input = this.input;
+    final result = this.result;
+    for (int r = 0; r < rounds; r++) {
+      for (int i = 0; i < count; i++) {
+        result[i] = input[i];
+      }
+    }
+  }
+}
+
+class PointerDoubleCopyViaSetRangeBenchmark extends PointerDoubleCopyBenchmark {
+  PointerDoubleCopyViaSetRangeBenchmark(int bytes) : super('setRange', bytes);
+
+  @override
+  void run(int rounds) {
+    for (int r = 0; r < rounds; r++) {
+      result
+          .asTypedList(PointerDoubleCopyBenchmark.maxSizeInElements)
+          .setRange(0, count, input.asTypedList(count));
+    }
+  }
+}
+
+final argParser = ArgParser()
+  ..addFlag('verbose', abbr: 'v', help: 'Verbose output', defaultsTo: false)
+  ..addFlag('aligned',
+      abbr: 'a', help: 'Align results on initial numbers', defaultsTo: false);
+
+final defaultLengthsInBytes = [8, 64, 512, 4 * 1024, 1024 * 1024];
+
+void main(List<String> args) {
+  final results = argParser.parse(args);
+  List<int> lengthsInBytes = defaultLengthsInBytes;
+  if (results.rest.isNotEmpty) {
+    lengthsInBytes =
+        results.rest.map(int.parse).where((i) => i <= maxSizeInBytes).toList();
+  }
+  final benchmarks = [
+    for (int bytes in lengthsInBytes) ...[
+      PointerUint8CopyViaMemcpyBenchmark(bytes),
+      PointerUint8CopyViaLoopBenchmark(bytes),
+      PointerDoubleCopyViaLoopBenchmark(bytes),
+      Uint8ListCopyViaLoopBenchmark(bytes),
+      Float64ListCopyViaLoopBenchmark(bytes),
+      PointerUint8CopyViaSetRangeBenchmark(bytes),
+      PointerDoubleCopyViaSetRangeBenchmark(bytes),
+      Uint8ListCopyViaSetRangeBenchmark(bytes),
+      Float64ListCopyViaSetRangeBenchmark(bytes),
+    ],
+  ];
+  for (var bench in benchmarks) {
+    bench.report(verbose: results['verbose'], aligned: results['aligned']);
+  }
+}