What is the "compilation time", I know perl is an interpreted language, so I guess there 'must' be an 'anti' for "compilation time" what is it?

Perl is an interpreted language in that you don't have to explicitly compile your program before running it, like you have to do in C. However, Perl is also a compiled language in that the Perl interpreter (compiler) automatically compiles your program into an intermediate code before it runs it. Hence, "compile time" and "run time."

If there are any syntax errors in your code, compilation fails. If compilation succeeds, you may still have logical errors and your program may not do what you expected it to do. There are also things you can do that happen at compile time (for example, a BEGIN block) before the rest of the program actually runs.