diff --git a/mobile/ios/Runner/Core/URLSessionManager.swift b/mobile/ios/Runner/Core/URLSessionManager.swift
index e9d65d3113..3c14efac56 100644
--- a/mobile/ios/Runner/Core/URLSessionManager.swift
+++ b/mobile/ios/Runner/Core/URLSessionManager.swift
@@ -146,7 +146,7 @@ class URLSessionManager: NSObject {
 
   private static func buildSession(delegate: URLSessionManagerDelegate) -> URLSession {
     let config = URLSessionConfiguration.default
-    config.urlCache = urlCache
+    // config.urlCache = urlCache
     config.httpCookieStorage = cookieStorage
     config.httpMaximumConnectionsPerHost = 64
     config.timeoutIntervalForRequest = 60
diff --git a/mobile/lib/presentation/widgets/asset_viewer/asset_viewer.page.dart b/mobile/lib/presentation/widgets/asset_viewer/asset_viewer.page.dart
index 3308ae8295..300cd2c236 100644
--- a/mobile/lib/presentation/widgets/asset_viewer/asset_viewer.page.dart
+++ b/mobile/lib/presentation/widgets/asset_viewer/asset_viewer.page.dart
@@ -147,7 +147,7 @@ class _AssetViewerState extends ConsumerState<AssetViewer> {
   }
 
   void _onAssetInit(Duration timeStamp) {
-    _preloader.preload(widget.initialIndex, context.sizeData);
+    // _preloader.preload(widget.initialIndex, context.sizeData);
     _handleCasting();
   }
 
@@ -158,7 +158,7 @@ class _AssetViewerState extends ConsumerState<AssetViewer> {
     if (asset == null) return;
 
     AssetViewer._setAsset(ref, asset);
-    _preloader.preload(index, context.sizeData);
+    // _preloader.preload(index, context.sizeData);
     _handleCasting();
     _stackChildrenKeepAlive?.close();
     _stackChildrenKeepAlive = ref.read(stackChildrenNotifier(asset).notifier).ref.keepAlive();
diff --git a/mobile/lib/presentation/widgets/images/thumbnail.widget.dart b/mobile/lib/presentation/widgets/images/thumbnail.widget.dart
index 70a9057e12..299208b9c4 100644
--- a/mobile/lib/presentation/widgets/images/thumbnail.widget.dart
+++ b/mobile/lib/presentation/widgets/images/thumbnail.widget.dart
@@ -8,11 +8,16 @@ import 'package:immich_mobile/presentation/widgets/images/image_provider.dart';
 import 'package:immich_mobile/presentation/widgets/images/remote_image_provider.dart';
 import 'package:immich_mobile/presentation/widgets/images/thumb_hash_provider.dart';
 import 'package:immich_mobile/presentation/widgets/timeline/constants.dart';
+import 'package:immich_mobile/utils/image_load_histogram.dart';
 import 'package:logging/logging.dart';
 
 final log = Logger('ThumbnailWidget');
 
-enum ThumbhashMode { enabled, disabled, only }
+enum ImageType { thumbnail }
+
+final remoteImageHistogram = Histogram<ImageType>(maxSamples: 8192, values: ImageType.values);
+
+int thumbnailId = 0;
 
 class Thumbnail extends StatefulWidget {
   final ImageProvider? imageProvider;
@@ -111,8 +116,11 @@ class _ThumbnailState extends State<Thumbnail> with SingleTickerProviderStateMix
     if (imageProvider == null) return;
 
     final imageStream = _imageStream = imageProvider.resolve(ImageConfiguration.empty);
+    final stopwatch = Stopwatch();
+    final curThumbnailId = thumbnailId++;
     final imageStreamListener = _imageStreamListener = ImageStreamListener(
       (ImageInfo imageInfo, bool synchronousCall) {
+        stopwatch.stop();
         _stopListeningToThumbhashStream();
         if (!mounted) {
           imageInfo.dispose();
@@ -123,7 +131,27 @@ class _ThumbnailState extends State<Thumbnail> with SingleTickerProviderStateMix
           return;
         }
 
-        if ((synchronousCall && _providerImage == null) || !_isVisible()) {
+        final renderObject = context.findRenderObject() as RenderBox?;
+        final double topLeft;
+        final double bottomRight;
+        final double contextHeight = context.height;
+        if (renderObject == null || !renderObject.attached) {
+          topLeft = double.maxFinite;
+          bottomRight = double.maxFinite;
+        } else {
+          topLeft = renderObject.localToGlobal(Offset.zero).dy;
+          bottomRight = renderObject.localToGlobal(Offset(renderObject.size.width, renderObject.size.height)).dy;
+        }
+        remoteImageHistogram.record(
+          ImageType.thumbnail,
+          stopwatch.elapsedMicroseconds,
+          topLeft.toInt(),
+          bottomRight.toInt(),
+          contextHeight.toInt(),
+          curThumbnailId,
+        );
+
+        if ((synchronousCall && _providerImage == null) || !(topLeft < contextHeight && bottomRight > 0)) {
           _fadeController.value = 1.0;
         } else if (_fadeController.isAnimating) {
           _fadeController.forward();
@@ -146,6 +174,7 @@ class _ThumbnailState extends State<Thumbnail> with SingleTickerProviderStateMix
         _stopListeningToImageStream();
       },
     );
+    stopwatch.start();
     imageStream.addListener(imageStreamListener);
   }
 
diff --git a/mobile/lib/presentation/widgets/timeline/timeline.widget.dart b/mobile/lib/presentation/widgets/timeline/timeline.widget.dart
index 8d494a8452..04fec11533 100644
--- a/mobile/lib/presentation/widgets/timeline/timeline.widget.dart
+++ b/mobile/lib/presentation/widgets/timeline/timeline.widget.dart
@@ -7,6 +7,7 @@ import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
+import 'package:flutter/scheduler.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/domain/models/asset/base_asset.model.dart';
 import 'package:immich_mobile/domain/models/events.model.dart';
@@ -17,6 +18,7 @@ import 'package:immich_mobile/extensions/asyncvalue_extensions.dart';
 import 'package:immich_mobile/extensions/build_context_extensions.dart';
 import 'package:immich_mobile/presentation/widgets/action_buttons/download_status_floating_button.widget.dart';
 import 'package:immich_mobile/presentation/widgets/bottom_sheet/general_bottom_sheet.widget.dart';
+import 'package:immich_mobile/presentation/widgets/images/thumbnail.widget.dart';
 import 'package:immich_mobile/presentation/widgets/timeline/constants.dart';
 import 'package:immich_mobile/presentation/widgets/timeline/scrubber.widget.dart';
 import 'package:immich_mobile/presentation/widgets/timeline/segment.model.dart';
@@ -140,10 +142,14 @@ class _SliverTimeline extends ConsumerStatefulWidget {
   ConsumerState createState() => _SliverTimelineState();
 }
 
-class _SliverTimelineState extends ConsumerState<_SliverTimeline> {
+class _SliverTimelineState extends ConsumerState<_SliverTimeline> with SingleTickerProviderStateMixin {
   late final ScrollController _scrollController;
   StreamSubscription? _eventSubscription;
 
+  Ticker? _autoScrollTicker;
+  Duration _lastTickTime = Duration.zero;
+  static const _autoScrollVelocity = 4800.0; // pixels per second
+
   // Drag selection state
   bool _dragging = false;
   TimelineAssetIndex? _dragAnchorIndex;
@@ -246,11 +252,52 @@ class _SliverTimelineState extends ConsumerState<_SliverTimeline> {
 
   @override
   void dispose() {
+    _stopAutoScroll();
     _scrollController.dispose();
     _eventSubscription?.cancel();
     super.dispose();
   }
 
+  void _toggleAutoScroll() {
+    if (_autoScrollTicker?.isActive ?? false) {
+      _stopAutoScroll();
+    } else {
+      _startAutoScroll();
+    }
+  }
+
+  void _startAutoScroll() {
+    _lastTickTime = Duration.zero;
+    _autoScrollTicker = createTicker(_onAutoScrollTick)..start();
+  }
+
+  void _stopAutoScroll() {
+    _autoScrollTicker?.stop();
+    _autoScrollTicker?.dispose();
+    _autoScrollTicker = null;
+  }
+
+  void _onAutoScrollTick(Duration elapsed) {
+    if (_lastTickTime == Duration.zero) {
+      _lastTickTime = elapsed;
+      return;
+    }
+
+    final deltaSeconds = (elapsed - _lastTickTime).inMicroseconds / 1000000.0;
+    _lastTickTime = elapsed;
+
+    final newOffset = _scrollController.offset + (_autoScrollVelocity * deltaSeconds);
+    final maxOffset = _scrollController.position.maxScrollExtent;
+    if (newOffset >= maxOffset || remoteImageHistogram.count(ImageType.thumbnail) >= remoteImageHistogram.maxSamples) {
+      _scrollController.jumpTo(newOffset.clamp(0, maxOffset));
+      _stopAutoScroll();
+      remoteImageHistogram.logAll();
+      remoteImageHistogram.save();
+    } else {
+      _scrollController.jumpTo(newOffset);
+    }
+  }
+
   void _scrollToDate(DateTime date) {
     final asyncSegments = ref.read(timelineSegmentProvider);
     asyncSegments.whenData((segments) {
@@ -434,6 +481,16 @@ class _SliverTimelineState extends ConsumerState<_SliverTimeline> {
             controller: _scrollController,
             child: RawGestureDetector(
               gestures: {
+                SerialTapGestureRecognizer: GestureRecognizerFactoryWithHandlers<SerialTapGestureRecognizer>(
+                  () => SerialTapGestureRecognizer(),
+                  (SerialTapGestureRecognizer tap) {
+                    tap.onSerialTapDown = (details) {
+                      if (details.count == 3) {
+                        _toggleAutoScroll();
+                      }
+                    };
+                  },
+                ),
                 CustomScaleGestureRecognizer: GestureRecognizerFactoryWithHandlers<CustomScaleGestureRecognizer>(
                   () => CustomScaleGestureRecognizer(),
                   (CustomScaleGestureRecognizer scale) {
diff --git a/mobile/lib/utils/image_load_histogram.dart b/mobile/lib/utils/image_load_histogram.dart
new file mode 100644
index 0000000000..e2236223c7
--- /dev/null
+++ b/mobile/lib/utils/image_load_histogram.dart
@@ -0,0 +1,154 @@
+import 'dart:convert';
+import 'dart:io';
+import 'dart:math';
+import 'dart:typed_data';
+
+import 'package:logging/logging.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:share_plus/share_plus.dart';
+
+/// Ring buffer histogram for performance profiling.
+class Histogram<T extends Enum> {
+  final int _stride;
+  final int _strideMask;
+  final List<T> _values;
+  final Int64List _counts;
+  final Int64List _data;
+  final Stopwatch _clock;
+  static final _log = Logger('Histogram');
+
+  Histogram({required int maxSamples, required List<T> values})
+    : assert(maxSamples & (maxSamples - 1) == 0, 'maxSamples must be power of 2'),
+      _stride = maxSamples,
+      _strideMask = maxSamples - 1,
+      _values = values,
+      _counts = Int64List(values.length),
+      _data = Int64List(maxSamples * values.length * 6),
+      _clock = Stopwatch()..start();
+
+  @pragma("vm:prefer-inline")
+  @pragma("vm:unsafe:no-bounds-checks")
+  void record(T type, int microseconds, int topLeft, int bottomRight, int contextHeight, int id) {
+    final i = type.index;
+    final count = _counts[i];
+    final slot = count & _strideMask;
+
+    final offset = (i * _stride + slot) * 6;
+    _data[offset] = microseconds;
+    _data[offset + 1] = _clock.elapsedMicroseconds;
+    _data[offset + 2] = topLeft;
+    _data[offset + 3] = bottomRight;
+    _data[offset + 4] = contextHeight;
+    _data[offset + 5] = id;
+    _counts[i] = count + 1;
+  }
+
+  int count(T type) => _counts[type.index].clamp(0, _stride);
+
+  int get maxSamples => _stride;
+
+  @pragma("vm:unsafe:no-bounds-checks")
+  void log(T type) {
+    final index = type.index;
+    final total = _counts[index];
+    final count = min(total, _stride);
+    if (count == 0) return;
+
+    final baseOffset = index * _stride * 6;
+    final scratch = Int64List(count);
+
+    for (int i = 0; i < count; i++) {
+      scratch[i] = _data[baseOffset + i * 6];
+    }
+    scratch.sort();
+
+    int sum = 0;
+    for (int i = 0; i < count; i++) {
+      sum += scratch[i];
+    }
+
+    _log.info(
+      '${type.name} (n=$total, sampled=$count) - '
+      'Avg: ${(sum / count / 1000.0).toStringAsFixed(2)}ms, '
+      'Min: ${(scratch[0] / 1000.0).toStringAsFixed(2)}ms, '
+      'Max: ${(scratch[count - 1] / 1000.0).toStringAsFixed(2)}ms, '
+      'P25: ${(_percentile(scratch, count, 0.25) / 1000.0).toStringAsFixed(2)}ms, '
+      'P50: ${(_percentile(scratch, count, 0.50) / 1000.0).toStringAsFixed(2)}ms, '
+      'P75: ${(_percentile(scratch, count, 0.75) / 1000.0).toStringAsFixed(2)}ms, '
+      'P90: ${(_percentile(scratch, count, 0.90) / 1000.0).toStringAsFixed(2)}ms, '
+      'P95: ${(_percentile(scratch, count, 0.95) / 1000.0).toStringAsFixed(2)}ms, '
+      'P99: ${(_percentile(scratch, count, 0.99) / 1000.0).toStringAsFixed(2)}ms',
+    );
+  }
+
+  void logAll() {
+    for (final value in _values) {
+      log(value);
+    }
+  }
+
+  @pragma("vm:unsafe:no-bounds-checks")
+  (Int64List, Int64List, Int64List, Int64List, Int64List, Int64List) getSamples(T type) {
+    final index = type.index;
+    final count = min(_counts[index], _stride);
+    final samples = Int64List(count);
+    final timestamps = Int64List(count);
+    final topLeft = Int64List(count);
+    final bottomRight = Int64List(count);
+    final contextHeight = Int64List(count);
+    final id = Int64List(count);
+
+    final baseOffset = index * _stride * 6;
+    for (int i = 0; i < count; i++) {
+      samples[i] = _data[baseOffset + i * 6];
+      timestamps[i] = _data[baseOffset + i * 6 + 1];
+      topLeft[i] = _data[baseOffset + i * 6 + 2];
+      bottomRight[i] = _data[baseOffset + i * 6 + 3];
+      contextHeight[i] = _data[baseOffset + i * 6 + 4];
+      id[i] = _data[baseOffset + i * 6 + 5];
+    }
+    return (samples, timestamps, topLeft, bottomRight, contextHeight, id);
+  }
+
+  @pragma("vm:unsafe:no-bounds-checks")
+  Future<File> save({bool share = true}) async {
+    final dir = await getApplicationDocumentsDirectory();
+    final timestamp = DateTime.now().toIso8601String().replaceAll(':', '-');
+    final file = File('${dir.path}/samples_$timestamp.json');
+
+    final data = {};
+    for (int i = 0; i < _counts.length; i++) {
+      final name = _values[i].name;
+      final (samples, timestamps, topLeft, bottomRight, contextHeight, id) = getSamples(_values[i]);
+      data['${name}_us'] = samples;
+      data['${name}_ts'] = timestamps;
+      data['${name}_top_left'] = topLeft;
+      data['${name}_bottom_right'] = bottomRight;
+      data['${name}_context_height'] = contextHeight;
+      data['${name}_id'] = id;
+    }
+    data['timestamp'] = DateTime.now().toIso8601String();
+    await file.writeAsString(jsonEncode(data));
+    _log.info('Saved samples to ${file.path}');
+
+    if (share) {
+      await Share.shareXFiles([XFile(file.path)]);
+    }
+
+    return file;
+  }
+
+  void reset(T type) {
+    _counts[type.index] = 0;
+  }
+
+  void resetAll() {
+    _counts.fillRange(0, _counts.length, 0);
+  }
+
+  @pragma("vm:prefer-inline")
+  int _percentile(Int64List sorted, int count, double p) {
+    final idx = ((count - 1) * p).round();
+    return sorted[idx];
+  }
+}