Difference between obsolete and waste code -

Difference between obsolete and waste code -

what difference between terms: "obsolete code" , "waste code"? if there difference, approaches eligible reduction?

obsolete code:

code may have been useful in past, no longer used, e.g. code utilize deprecated protocol.

waste code:

never heard of term, i'd imagine - code may or may not executed can removed without changing workings of application. i'd imagine include obsolete code.

either of above can range single statements entire libraries.

obsolete