99% of Developers Don't Get JIT Compilers

JIT (Just-In-Time) compilers bridge the gap between interpreters and ahead-of-time compilers by initially interpreting bytecode and then compiling frequently used code sections into native machine code during runtime. This approach combines the portability of bytecode with near-native performance, as the compiler can observe actual usage patterns and apply adaptive optimizations. JIT compilers are essential to modern platforms like Java, .NET, and JavaScript engines, allowing programs to start quickly while becoming faster over time as hot code paths are identified and optimized.