28.4.3. JIT Optimization Techniques

Try these first

1. 1.

   What is method inlining in JIT optimization?

   Hint

   Think about reducing method call overhead.

2. 2.

   How does loop unrolling improve performance?

   Hint

   Consider how many times the loop actually runs.

3. 3.

   What does method inlining do?

   • A. Calls method directly
   • B. Replaces method code with call
   • C. Replaces method call with its body

   Hint

   Remember, it changes the way the compiler sees method usage.

4. 4.

   True or False: Loop unrolling simplifies loops by reducing the number of iterations.

   • True
   • False

   Hint

   Think about how loops run in a program.

5. 5.

   Devise a scenario where using escape analysis can significantly affect performance. Explain how it would change the allocation method.

   Hint

   Look at how often an object is used outside of its defining method.

6. 6.

   Analyze the performance impact of dead code elimination in a large codebase with extensive feature toggles that may lead to unused code paths.

   Hint

   Consider the correlation between unused features and performance metrics.