An ahead-of-time (AOT) compiler is a compiler that implements ahead-of-time compilation. This refers to the act of compiling an intermediate language, such as Java bytecode, .NET Common Intermediate Language (CIL), or IBM System/38 or IBM System i "Technology Independent Machine Interface" code, into a system-dependent binary.
Most languages with a managed runtime that can be compiled to an intermediate language take advantage of just-in-time (JIT). This, briefly, compiles intermediate code into binary code for a native run while the intermediate code is executing, which may decrease an application's performance. Ahead-of-time compilation eliminates the need for this step by performing the compilation before execution rather than during execution.
See also
- SharpOS AOT (CIL)
- IL2CPU (CIL)
- GNU Compiler for Java
- Excelsior JET (Java)
External links
.NET:
- Speed: NGen Revs Up Your Performance with Powerful New Features -- MSDN Magazine, April 2005
- Mono AOT
Java:
- Excelsior JET -- Java SE 6 Implementation with AOT compiler
- GNU Compiler for Java
- Aonix PERC Ultra
- Real-time Java, Part 2: Comparing compilation techniques -- IBM developerWorks, April 2007
- Improving Swing Performance: JIT vs AOT Compilation -- LinuxWorld Magazine, November 2004
- manta
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