Try using progressive jpeg photo size.

Telegram/SourceFiles/data/data_cloud_file.cpp

@@ -160,6 +160,9 @@ void UpdateCloudFile(
 		Fn<void(FileOrigin)> restartLoader,
 		Fn<void(QImage)> usePreloaded) {
 	if (!data.location.valid()) {
+		if (data.progressivePartSize && !file.location.valid()) {
+			file.progressivePartSize = data.progressivePartSize;
+		}
 		return;
 	}
 
@@ -208,11 +211,18 @@ void LoadCloudFile(
 		Fn<bool()> finalCheck,
 		Fn<void(CloudFile&)> done,
 		Fn<void(bool)> fail,
-		Fn<void()> progress) {
+		Fn<void()> progress,
+		int downloadFrontPartSize = 0) {
+	const auto loadSize = downloadFrontPartSize
+		? downloadFrontPartSize
+		: file.byteSize;
 	if (file.loader) {
 		if (fromCloud == LoadFromCloudOrLocal) {
 			file.loader->permitLoadFromCloud();
 		}
+		if (file.loader->fullSize() < loadSize) {
+			file.loader->increaseLoadSize(loadSize);
+		}
 		return;
 	} else if ((file.flags & CloudFile::Flag::Failed)
 		|| !file.location.valid()
@@ -225,7 +235,7 @@ void LoadCloudFile(
 		file.location.file(),
 		origin,
 		QString(),
-		file.byteSize,
+		loadSize,
 		UnknownFileLocation,
 		LoadToCacheAsWell,
 		fromCloud,
@@ -275,7 +285,8 @@ void LoadCloudFile(
 		Fn<bool()> finalCheck,
 		Fn<void(QImage)> done,
 		Fn<void(bool)> fail,
-		Fn<void()> progress) {
+		Fn<void()> progress,
+		int downloadFrontPartSize) {
 	const auto callback = [=](CloudFile &file) {
 		if (auto read = file.loader->imageData(); read.isNull()) {
 			file.flags |= CloudFile::Flag::Failed;
@@ -296,7 +307,8 @@ void LoadCloudFile(
 		finalCheck,
 		callback,
 		std::move(fail),
-		std::move(progress));
+		std::move(progress),
+		downloadFrontPartSize);
 }
 
 void LoadCloudFile(