A compiler translates the entire source code of a program into machine code before the program is run, creating an executable file. This often results in faster runtime performance because the code is pre-translated. An interpreter, on the other hand, translates and executes the source code line-by-line at runtime, allowing for easier debugging and platform independence but typically slower execution. The choice depends on the needs for speed, development flexibility, and deployment.
A compiler translates the entire source code into machine code before execution, making programs run faster but requiring recompilation after changes. An interpreter translates and executes code line by line, allowing easier debugging and immediate execution but generally slower performance.