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JIT
by earl, 3359 days ago
Just-In-Time

In compilers, a "JIT compiler", also referred to as "jitter", compiles a piece of code just before executing it, in order to subsequently execute the compilation result instead. Typically, the input to a jitter is some form of bytecode (which could alternatively be interpreted) and the output is native code.

Some prominent examples, past and present, include:

- pioneering work in Sun's Self and ParcPlace Systems' [create ObjectWorks],
- HP's Dynamo project, which JIT-compiled native code into (improved) native code,
- Sun's [create HotSpot] JVM, which compiles Java bytecode into native code, or
- LLVM, compiling LLVM bytecode into native code.
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