50000 records recordset under postgres7

RecordCount secs: 0.747494935989
With FetchNextObj (auto Next) secs: 1.99175810814
With FetchNextObj using eof (auto Next) secs: 1.86211419106
With FetchRow (auto Next) secs: 1.04218697548
With FetchObj & Next secs: 1.79474806786
With Fields() & Next secs: 1.24294710159
With fields[] & Next secs: 0.996043920517
rs_fetch_record() and rs_next_record() secs: 1.98378896713
rs_fetch_next_record() (auto Next) secs: 1.19902300835