Tweak TupleBuf: we can allocate the TupleBuf itself via apr_palloc(), which is slightly faster than ol_alloc() + ol_free().
Tweak TupleBuf: we can allocate the TupleBuf itself via apr_palloc(),
which is slightly faster than ol_alloc() + ol_free().

bloom-lang/c4,bloom-lang/c4,bloom-lang/c4