Adds an impeller variant of the new gallery transition perf benchmark (#100837)

.ci.yaml

@@ -3526,6 +3526,16 @@ targets:
         ["devicelab","ios","mac"]
       task_name: new_gallery_ios__transition_perf
 
+  - name: Mac_ios new_gallery_impeller_ios__transition_perf
+    bringup: true # Flaky https://github.com/flutter/flutter/issues/96401
+    recipe: devicelab/devicelab_drone
+    presubmit: false
+    timeout: 60
+    properties:
+      tags: >
+        ["devicelab","ios","mac"]
+      task_name: new_gallery_impeller_ios__transition_perf
+
   - name: Mac_ios ios_picture_cache_complexity_scoring_perf__timeline_summary
     recipe: devicelab/devicelab_drone
     bringup: true

TESTOWNERS

@@ -163,6 +163,7 @@
 /dev/devicelab/bin/tasks/macos_chrome_dev_mode.dart @zanderso @flutter/tool
 /dev/devicelab/bin/tasks/microbenchmarks_ios.dart @zanderso @flutter/engine
 /dev/devicelab/bin/tasks/new_gallery_ios__transition_perf.dart @zanderso @flutter/engine
+/dev/devicelab/bin/tasks/new_gallery_impeller_ios__transition_perf.dart @zanderso @flutter/engine
 /dev/devicelab/bin/tasks/platform_channel_sample_test_ios.dart @zanderso @flutter/engine
 /dev/devicelab/bin/tasks/platform_channel_sample_test_swift.dart @zanderso @flutter/engine
 /dev/devicelab/bin/tasks/platform_channels_benchmarks_ios.dart @gaaclarke @flutter/engine

dev/devicelab/bin/tasks/new_gallery_impeller_ios__transition_perf.dart

+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:io';
+
+import 'package:flutter_devicelab/framework/devices.dart';
+import 'package:flutter_devicelab/framework/framework.dart';
+import 'package:flutter_devicelab/framework/utils.dart';
+import 'package:flutter_devicelab/tasks/new_gallery.dart';
+import 'package:path/path.dart' as path;
+
+Future<void> main() async {
+  deviceOperatingSystem = DeviceOperatingSystem.ios;
+
+  final Directory galleryParentDir = Directory.systemTemp.createTempSync('flutter_new_gallery_test.');
+  final Directory galleryDir = Directory(path.join(galleryParentDir.path, 'gallery'));
+
+  try {
+    await task(NewGalleryPerfTest(galleryDir, enableImpeller: true).run);
+  } finally {
+    rmTree(galleryParentDir);
+  }
+}

dev/devicelab/lib/tasks/new_gallery.dart

@@ -14,11 +14,13 @@ class NewGalleryPerfTest extends PerfTest {
     this.galleryDir, {
     String timelineFileName = 'transitions',
     String dartDefine = '',
+    bool enableImpeller = false,
   }) : super(
     galleryDir.path,
     'test_driver/transitions_perf.dart',
     timelineFileName,
     dartDefine: dartDefine,
+    enableImpeller: enableImpeller,
   );
 
   @override

dev/devicelab/lib/tasks/perf_tests.dart

@@ -815,6 +815,7 @@ class PerfTest {
     String? resultFilename,
     this.device,
     this.flutterDriveCallback,
+    this.enableImpeller = false,
   }): _resultFilename = resultFilename;
 
   const PerfTest.e2e(
@@ -829,6 +830,7 @@ class PerfTest {
     String resultFilename = 'e2e_perf_summary',
     this.device,
     this.flutterDriveCallback,
+    this.enableImpeller = false,
   }) : saveTraceFile = false, timelineFileName = null, _resultFilename = resultFilename;
 
   /// The directory where the app under test is defined.
@@ -860,6 +862,9 @@ class PerfTest {
   /// If it is not `null`, `flutter drive` will not happen in the PerfTests.
   final FlutterDriveCallback? flutterDriveCallback;
 
+  /// Whether the perf test should enable Impeller.
+  final bool enableImpeller;
+
   /// The keys of the values that need to be reported.
   ///
   /// If it's `null`, then report:
@@ -929,6 +934,7 @@ class PerfTest {
         if (cacheSkSL) '--cache-sksl',
         if (dartDefine.isNotEmpty)
           ...<String>['--dart-define', dartDefine],
+        if (enableImpeller) '--enable-impeller',
         '-d',
         deviceId,
       ];