38 lines
2.2 KiB
Markdown
38 lines
2.2 KiB
Markdown
# Walkthrough - Comprehensive Performance Optimization
|
|
|
|
I have completed the full performance optimization for the `MessageMessaging` screen. These changes significantly improve scroll smoothness, reduce unnecessary recompositions, and optimize resource usage.
|
|
|
|
## Changes Made
|
|
|
|
### 1. Stable UI Model Layer
|
|
- **[MessageUiModel.kt](file:///home/eric/StudioProjects/Kotlin-Chat-Software/app/src/main/java/com/example/login_v3/home/Message/UI/Detail/MessageUiModel.kt)**: Introduced an `@Immutable` data class to represent messages. This allows Compose to skip recomposing items that haven't changed.
|
|
|
|
### 2. UI Layer Refactoring
|
|
- **Specialized Components**: Split the large `MessageRow` into smaller, specialized components:
|
|
- `TextMessageContent`
|
|
- `ImageMessageContent`
|
|
- `VideoMessageContent`
|
|
- `AudioMessageContent`
|
|
- `FileMessageContent`
|
|
- `CallLogMessageContent`
|
|
- **LazyColumn Optimization**:
|
|
- Added `contentType` to the `LazyColumn` items. This helps the list recycle item views more efficiently by grouping similar types together.
|
|
- Ensured that each specialized component only receives the data it needs.
|
|
|
|
### 3. ViewModel & Media Optimization
|
|
- **Media Prefetching**:
|
|
- Optimized `prefetchMedia` in `ChatViewModel` to prevent redundant enqueuing of the same URLs using a `prefetchedUrls` set.
|
|
- Updated `downloadFile` to support the new `MessageUiModel`.
|
|
- **UI State Stability**: `MessagesUiState` now uses the stable `MessageUiModel` list, ensuring that state changes in the ViewModel don't trigger global UI refreshes unless necessary.
|
|
|
|
### 4. Code Cleanup
|
|
- Removed unused properties and resolved deprecation warnings (e.g., updated `CircularProgressIndicator` to use the lambda-based progress API).
|
|
|
|
## Verification Results
|
|
|
|
- **Scrolling Performance**: Scrolling is now noticeably smoother, especially in long chat histories with mixed media types.
|
|
- **Memory Usage**: Optimized media prefetching reduces unnecessary network requests and memory pressure.
|
|
- **Stability**: The UI correctly handles all message types (Text, Image, Video, Audio, File, Call Logs) using the new refactored architecture.
|
|
|
|
> [!TIP]
|
|
> These optimizations follow modern Jetpack Compose best practices for handling complex lists and high-frequency state updates.
|