Removing files from the source tree via find, exec and rm is not the
most efficient operation, due to (among other things) the many forked
processes.
If we use -delete, it saves a significant amount of time. But -delete
does not work with -prune (since it forces -depth). To maintain the
lib, tools and scripts source files, we can hide them temporarily,
skip their hidden directories and then finally restore them.
Time for install before this change:
real 2m48.563s
user 0m35.220s
sys 0m33.036s
Time for install after this change:
real 1m21.301s
user 0m33.160s
sys 0m28.388s
We could further speed this up by using inline perl to delete the files,
but that complexity is avoided for now.
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
