JIT (just-in-time compilation)

RU: JIT-компиляция (just-in-time)

A hybrid execution strategy in which the runtime compiles frequently executed bytecode or interpreted code to native machine code on the fly, while the program is running. This combines the portability of interpretation with near-native performance for hot paths. Examples: V8 TurboFan (JavaScript), JVM HotSpot (Java/Kotlin), .NET CLR (C#). Cold code may still be interpreted; JIT compilation is triggered after a function has been called enough times to justify the compilation cost.