Angular Performance Profiling Toolkit

Performance is critical for a smooth and responsive user experience in Angular applications. This challenge tasks you with building a basic, reusable Angular component that allows developers to profile the rendering performance of their components. The goal is to provide a simple interface to measure and display component rendering times, aiding in identifying performance bottlenecks.

Problem Description

You are to create an AngularPerformanceProfiler component. This component should:

1. Measure Rendering Time: When the component is initialized and whenever its input enabled flag changes to true, it should measure the time it takes to render its own template. This measurement should include the time spent in change detection cycles.
2. Display Rendering Time: Display the measured rendering time in milliseconds (e.g., "Rendering Time: 123ms").
3. Enable/Disable Profiling: The component should accept an input property called enabled (boolean). When enabled is true, profiling should be active, and the rendering time should be displayed. When enabled is false, profiling should be inactive, and the rendering time display should be hidden or cleared.
4. Reusable Component: The component should be designed to be easily integrated into other Angular components without requiring significant modifications.
5. Error Handling: Handle potential errors gracefully during the profiling process (e.g., if performance.now() is not available).

Expected Behavior:

• When enabled is set to true, the component should immediately start measuring its rendering time.
• The displayed rendering time should update whenever the component re-renders (e.g., due to input changes or data updates).
• When enabled is set to false, the rendering time display should disappear or be reset.
• The component should not introduce significant overhead when profiling is disabled.

Edge Cases to Consider:

• The browser might not support performance.now().
• The component might be rendered asynchronously.
• The component might be part of a complex change detection cycle.

Examples

Example 1:

Input: `enabled = true`
Output: "Rendering Time: 55ms" (or a similar value, depending on the environment)
Explanation: The component is initialized, profiling is enabled, and the rendering time is measured and displayed.

Example 2:

Input: `enabled = false`
Output: (No rendering time displayed, or the display is cleared)
Explanation: Profiling is disabled, and the rendering time display is hidden or reset.

Example 3:

Input: Browser does not support `performance.now()`
Output: "Profiling not supported in this browser." (or a similar error message)
Explanation: The component gracefully handles the lack of browser support for `performance.now()`.

Constraints

• Angular Version: The solution should be compatible with Angular 14 or later.
• Performance: The profiling mechanism should introduce minimal overhead when disabled. The profiling process itself should not significantly impact the application's performance.
• Code Clarity: The code should be well-structured, readable, and properly documented.
• No External Libraries: Do not use any external libraries for profiling. Utilize Angular's built-in features and the browser's performance.now() API.
• Component Size: Keep the component relatively small and focused on its core functionality.

Notes

• Consider using ngAfterViewInit and ngOnChanges lifecycle hooks to manage the profiling process.
• The performance.now() function provides high-resolution timestamps for measuring performance.
• Think about how to handle asynchronous rendering scenarios.
• Focus on creating a reusable component that can be easily integrated into other parts of your Angular application. Avoid hardcoding any specific styling or layout.
• You can use a simple template to display the rendering time. The visual presentation is less important than the core profiling functionality.