So it's
extracting two copies of these files. The ones placed in
%cache%\inc\lib\auto\Wx extract extremely fast (as expected) but the
same DLLs extract terribly slowly when PAR is placing them in the cache
root directory (something it seems to do after extracting the inc\lib\*
tree).
I dont suppose that it is doing something like calculating a hash value when doing the copy, or something else which is chewing time? Perhaps the copy operation is implemented in a sub optimal way?
I would need to open up the code to have a look, perhaps someone else knows exactly where to look, but this sounds like an important observation that you have made.
