Just In Time
Just In Time (JIT) is a computing optimization technique where code is compiled or translated into machine instructions at runtime, rather than ahead of time. It is commonly used in programming languages and virtual machines to improve performance by dynamically optimizing code based on execution patterns. This approach balances the flexibility of interpretation with the speed of native compilation.
Developers should learn JIT when working with performance-critical applications in languages like Java, C#, or JavaScript, as it enables faster execution by adapting to runtime conditions. It is particularly useful in virtual machines (e.g., JVM, .NET CLR) and modern web browsers to optimize JavaScript, reducing startup times and enhancing responsiveness in dynamic environments.