diff --git a/benchmark/levels.dart b/benchmark/levels.dart
deleted file mode 100644
index 3f08627..0000000
--- a/benchmark/levels.dart
+++ /dev/null
@@ -1,91 +0,0 @@
-// Times several extracted-block files against each other, interleaved, so that
-// CPU frequency drift lands on every file equally.
-//
-//     dart compile exe levels.dart -o /tmp/levels && /tmp/levels a.blocks b.blocks
-//
-// Each file is the format benchmark/same_blocks.dart reads: uint32 count, then
-// per block a uint32 frame length, a uint32 decompressed size, and the frame.
-// Every file must hold the same number of blocks, of the same output size, so
-// the medians are like for like.
-import 'dart:io';
-import 'dart:typed_data';
-
-import 'package:pure_zstd/pure_zstd.dart';
-
-const int warmSeconds = 4;
-const int passes = 60;
-
-List<Uint8List> load(String path, List<int> sizes) {
-  final bytes = File(path).readAsBytesSync();
-  final data = ByteData.sublistView(bytes);
-  final count = data.getUint32(0, Endian.big);
-  final frames = <Uint8List>[];
-  var at = 4;
-  for (var i = 0; i < count; i++) {
-    final length = data.getUint32(at, Endian.big);
-    final size = data.getUint32(at + 4, Endian.big);
-    if (sizes.length <= i) {
-      sizes.add(size);
-    } else if (sizes[i] != size) {
-      throw StateError(
-        '$path block $i is $size bytes out, expected ${sizes[i]}',
-      );
-    }
-    at += 8;
-    frames.add(Uint8List.sublistView(bytes, at, at + length));
-    at += length;
-  }
-  return frames;
-}
-
-void main(List<String> args) {
-  final sizes = <int>[];
-  final sets = args.map((path) => load(path, sizes)).toList();
-  for (final set in sets) {
-    if (set.length != sets.first.length) {
-      throw StateError('the files do not hold the same number of blocks');
-    }
-    for (var i = 0; i < set.length; i++) {
-      if (zstdDecode(set[i]).length != sizes[i]) {
-        throw StateError('block $i decoded to the wrong size');
-      }
-    }
-  }
-
-  // Spin long enough for the governor to raise the clock before anything is
-  // timed, otherwise the first file measured pays for the ramp.
-  final warm = Stopwatch()..start();
-  while (warm.elapsed.inSeconds < warmSeconds) {
-    for (final set in sets) {
-      for (final frame in set) {
-        zstdDecode(frame);
-      }
-    }
-  }
-
-  final micros = [for (final _ in sets) <int>[]];
-  for (var pass = 0; pass < passes; pass++) {
-    for (var b = 0; b < sets.first.length; b++) {
-      for (var s = 0; s < sets.length; s++) {
-        final watch = Stopwatch()..start();
-        zstdDecode(sets[s][b]);
-        watch.stop();
-        micros[s].add(watch.elapsedMicroseconds);
-      }
-    }
-  }
-
-  for (var s = 0; s < sets.length; s++) {
-    final xs = micros[s]..sort();
-    double q(double f) => xs[(xs.length * f).floor()] / 1000;
-    final median = q(0.5);
-    final bytes = sizes.reduce((a, b) => a + b) / sizes.length;
-    stdout.writeln(
-      '${args[s].split('/').last.padRight(24)} n=${xs.length} '
-      'median=${median.toStringAsFixed(3)}ms '
-      'p10=${q(0.1).toStringAsFixed(3)} p90=${q(0.9).toStringAsFixed(3)} '
-      'MBps=${(bytes / 1048576 / (median / 1000)).toStringAsFixed(0)} '
-      'sweep113=${(median * 113).toStringAsFixed(0)}ms',
-    );
-  }
-}
diff --git a/benchmark/same_blocks.dart b/benchmark/same_blocks.dart
deleted file mode 100644
index 74bd159..0000000
--- a/benchmark/same_blocks.dart
+++ /dev/null
@@ -1,51 +0,0 @@
-// Times the same extracted blocks the on-device benchmark uses, so the two
-// numbers are like for like.
-import 'dart:io';
-import 'dart:typed_data';
-
-import 'package:pure_zstd/pure_zstd.dart';
-
-void main(List<String> args) {
-  final bytes = File(args.first).readAsBytesSync();
-  final data = ByteData.sublistView(bytes);
-  final count = data.getUint32(0, Endian.big);
-  final frames = <Uint8List>[];
-  final sizes = <int>[];
-  var at = 4;
-  for (var i = 0; i < count; i++) {
-    final length = data.getUint32(at, Endian.big);
-    sizes.add(data.getUint32(at + 4, Endian.big));
-    at += 8;
-    frames.add(Uint8List.sublistView(bytes, at, at + length));
-    at += length;
-  }
-  for (var i = 0; i < frames.length; i++) {
-    if (zstdDecode(frames[i]).length != sizes[i]) {
-      throw StateError('block $i decoded to the wrong size');
-    }
-  }
-  for (var pass = 0; pass < 20; pass++) {
-    for (final frame in frames) {
-      zstdDecode(frame);
-    }
-  }
-  final micros = <int>[];
-  for (var pass = 0; pass < 60; pass++) {
-    for (final frame in frames) {
-      final watch = Stopwatch()..start();
-      zstdDecode(frame);
-      watch.stop();
-      micros.add(watch.elapsedMicroseconds);
-    }
-  }
-  micros.sort();
-  double q(double f) => micros[(micros.length * f).floor()] / 1000;
-  final median = q(0.5);
-  stdout.writeln(
-    'samples=${micros.length} bytesOut=${sizes.first} '
-    'median=${median.toStringAsFixed(3)}ms p10=${q(0.1).toStringAsFixed(3)} '
-    'p90=${q(0.9).toStringAsFixed(3)} '
-    'MBps=${(sizes.first / 1048576 / (median / 1000)).toStringAsFixed(0)} '
-    'sweep113=${(median * 113).toStringAsFixed(0)}ms',
-  );
-}