--enable-querytrace has negative performance impact - update the documentation to say this
- [func] Add a --enable-querytrace configure switch for very verbose query trace logging. (This option has a negative performance impact and should be used only for debugging.) [RT #37520]
But apart from telling users of BIND about the performance implications of --enable-querytrace when we first introduced it, there is nothing else in the ./configure -help output or in the BIND README file that tells users that turning this on could hurt them.
It would be a good idea to document the performance implications of this (and any other build features) so that they're not innocently enabled and cause unexpected harm.
(See also #13776