50000 records recordset under mysqli

RecordCount secs: 0.269491910934
With FetchNextObj (auto Next) secs: 1.65399694443
With FetchNextObj using eof (auto Next) secs: 1.64796090126
With FetchRow (auto Next) secs: 0.606180906296
With FetchObj & Next secs: 1.62004899979
With Fields() & Next secs: 0.988502025604
With fields[] & Next secs: 0.619621992111
rs_fetch_record() and rs_next_record() secs: 1.79705715179
rs_fetch_next_record() (auto Next) secs: 0.734047889709