What are the performance differences between JIT and AOT compilation?

What are the performance differences between JIT and AOT compilation?

JIT (Just-In-Time) compilation compiles code at runtime, which can lead to optimizations based on actual usage. AOT (Ahead-Of-Time) compilation, on the other hand, compiles code before execution, which can result in faster startup times but may miss runtime optimizations.

Which one is generally faster during execution?

AOT compilation typically results in faster execution times since the code is pre-compiled. However, JIT can optimize code during execution, potentially leading to better performance in long-running applications.

Are there scenarios where JIT is preferred over AOT?

Yes, JIT is preferred in scenarios where applications need to adapt to varying workloads or when rapid development and testing are required, as it allows for dynamic optimizations.

What about memory usage between the two?

AOT usually has a lower memory footprint since it doesn't require the overhead of a runtime compiler. JIT can consume more memory due to the need for storing compiled code and runtime data.