why dolphin is slow in my computer

[amir.coder]

one years ago , i had pentium dual core e5300
mortal kombat armageddon in all version of dolphin was 60-70%
but in 6964 , mka was 100 % !
in 6964 , most game run very better than other versions for e5300
i think there is a another version that better for core i3 3240