Indeed, division just doesn't have a parallel algorithm, unlikely mul and add. So it's bound to be 'slow'. About 2008 - Intel core 2 (2006) had 3 cycle mul. Edi

Indeed, division just doesn't have a parallel algorithm, unlikely mul and add. So it's bound to be 'slow'. About 2008 - Intel core 2 (2006) had 3 cycle mul. Edit: Pentium Pro(1995)'s imul was 4 cycles. 386's imul was slow, though.