hashcat mask attack very slow

the hashcat mask attack is taking too lone it will finish after 1 day 16 hours i am hacking wifi in a students competition is there any way to make it faster so i win the competition .

this is my command :

hashcat -m 2500 -a 3  OURFILEHF7.hccap  ?d?d?d?d?d?d?d?u --pw-min=8 --pw-max=8