Compilation is the translation process performed by a compiler, which may include checking and transforming an abstract syntax tree. Translation can finish before execution, or happen during execution through just-in-time compilation. Reusing the translated representation can avoid repeated parsing and repeated constant folding when only the inputs change. This does not guarantee a speedup: translation itself costs work, and the choice of representation and execution mechanism matters.
One possible compilation pipeline for
. Details. x*(2+3)-4, with execution from an abstract syntax tree, a stack machine instruction sequence, or machine code
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