Yes, and this everything goes makes it difficult to spot bugs. Perl byte-code compiled a program at start and was able to find a number of bugs (if the warning

Yes, and this everything goes makes it difficult to spot bugs. Perl byte-code compiled a program at start and was able to find a number of bugs (if the warnings option was enabled). If e.g. a variable is misspelled in TCL, you'll find out exactly when that particular line of code is reached. If that happens to be in the error path ...