/ x ; ▁ ▁a ▁= ▁x ▁* ▁ 9 ; ▁x ▁= ▁ 3 ; ▁b ▁= ▁a / x ; ▁ ▁c ▁= ▁x ▁* ▁ 1 ; ▁x ▁= ▁ 1 1 ; ▁d ▁= ▁c / x ; ▁ ▁Notice ▁that ▁in ▁order ▁to ▁make ▁the ▁sequ ential ▁code ▁above ▁parallel , ▁a ▁few ▁extra ▁lines ▁of ▁code ▁had ▁to ▁be ▁added ▁so ▁that ▁" x " ▁could ▁be ▁priv at ized . ▁ ▁Because ▁of ▁this , ▁this ▁example ▁may ▁not ▁actually ▁see ▁much ▁of ▁a ▁speed ▁up . ▁ ▁However , ▁in ▁larger / long er ▁examples ▁this ▁technique ▁could ▁help ▁improve ▁performance ▁a ▁lot . ▁ ▁// Par allel ▁Code : ▁// Ass ume ▁the ▁variables ▁have ▁already ▁been ▁declared ▁x ▁= ▁ 1 ; ▁y ▁= ▁x ▁* ▁ 3 ; ▁x ▁= ▁ 4 ; ▁z ▁= ▁y / x ; ▁ ▁x ’ ▁= ▁ 4 ; ▁a ▁= ▁x ’ ▁* ▁ 9 ; ▁x ’ ▁= ▁ 3 ; ▁b ▁= ▁a / x ’ ; ▁ ▁x ’ ’ ▁= ▁ 3 ; ▁c ▁= ▁x ’ ’ ▁* ▁ 1 ; ▁x ’ ’ ▁= ▁ 1 1 ; ▁d ▁= ▁c / x ’ ’ ; ▁ ▁Example ▁ 3 ▁ ▁One ▁example ▁when ▁priv at ization ▁fails ▁is ▁when ▁a ▁value ▁is ▁written ▁in ▁one ▁task ▁and ▁read ▁in ▁another ▁and ▁the ▁value ▁is ▁not ▁known ▁ahead ▁of ▁time . ▁ ▁Take ▁this ▁example ▁of ▁sum ming