Is it acceptable to not parse unittest blocks when unittests are disabled ?

[deadalnix via Digitalmars-d]

I was wondering. When uniitests aren't going to run, it may be 
desirable to skip parsing altogether, just lexing and counting 
braces until the matching closing brace is found.

Obviously, this means that no error will be found in unittests 
blocks. That can contain pretty much anything that lex, so it's 
even more lax than what's allowed inside a static if.

Is that an acceptable tradeof ?