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# Compiled vs Interpreted

| Compiled                                                                                                      | Interpreted                                                                                           |
| ------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------- |
| compiler is a program that translates statements from programming language to another language (machine code) | Translating each statement into a sequence of one or more subroutines and then into machine code      |
| Not on the fly                                                                                                | On the fly                                                                                            |
| Speed of execution: executable can be directly executed on the target machine                                 | Nowadays, interpreted compiles into bytecode first -> prepare and optimize for further interpretation |
| Programs have to be compiled for a specific cpu architecture                                                  | There are not many fully interpreted languages left                                                   |
| Long compilation time                                                                                         | Faster compilation: for the implementations that compile to bytecode                                  |
| C, Go, Rust,..                                                                                                | Slower execution speed, potential for leaking source code                                             |
|                                                                                                               | JS                                                                                                    |

JIT (Just in time): 

* hybrid between normal compilation and interpretation
* Store already compiled machine code (base on how often a piece of code is executed)

![](/files/Psfqgt4se1Ahr19XUxCk)


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