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What is the primary purpose of performance profiling in software development?
To optimize every line of code in an application for maximum speed.
To identify the code that represents performance bottlenecks and focus optimization efforts there.
To replace all manual code reviews with automated performance analysis.
Why is establishing a performance baseline critical before making optimizations?
It's required by most development frameworks and tools.
It provides a reference point to objectively measure if optimizations helped or made things worse.
It automatically fixes performance issues without manual intervention.
Which .NET tool is recommended for comprehensive performance benchmarking with accurate measurements?
System.Diagnostics.Stopwatch for all performance measurements.
BenchmarkDotNet for handling just-in-time compilation, garbage collection interference, and measurement precision.
Console.WriteLine statements to output timing information.
What type of questions can GitHub Copilot's Ask mode help answer during performance analysis?
Only basic syntax questions about programming languages.
Algorithmic inefficiencies, optimization suggestions, and potential risks of performance changes.
Only questions about GitHub repository management and version control.
What is the key difference between GitHub Copilot's Ask mode and Agent mode for performance optimization?
Ask mode provides analysis and suggestions, while Agent mode implements changes directly in code files.
Ask mode only works with C# code, while Agent mode supports multiple languages.
Ask mode requires a subscription, while Agent mode is free for all users.
When using GitHub Copilot Agent mode to refactor performance-critical code, what should you do first?
Immediately start refactoring the slowest methods without any preparation.
Create unit tests that verify current behavior and ensure existing functionality is preserved.
Delete all existing code and start over with a new implementation.
What is a common performance optimization that Agent mode can help implement?
Replacing efficient algorithms with slower but more readable ones.
Converting linear searches to dictionary lookups and implementing intelligent caching mechanisms.
Removing all error handling to make code run faster.
You must answer all questions before checking your work.
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