void prepare( size_t nStart, size_t nEnd )
{
m_arr.reserve( nEnd - nStart );
for ( size_t i = nStart; i < nEnd; ++i )
m_arr.push_back( i );
std::random_shuffle( m_arr.begin(), m_arr.end() );
}
//-----------------------------------------------------------------//
handle_set(bool zhe = true, uint32_t fas = 0) : array_(), erase_set_(),
zero_handle_enable_(zhe) {
if(fas) {
array_.reserve(fas);
array_.clear();
}
if(zero_handle_enable_) array_.push_back(T());
}