Improved select():

- avoid malloc() if the number of fds is small.
- pack the bits better so that `small' is quite large.
- don't waste time generating zero bits for null fd_set pointers or
  scanning these bits.

Possibly improved select():
- free malloc()ed storage before returning.  This is simpler and I
  think huge select()s aren't worth optimizing since they are rare,
  relative gain would be small and there would be tiny costs for all
  selects().

Reviewed by:	ache (first version by him too)

0 files changed, 0 insertions, 0 deletions