Speed drop with hashfile parameter

Hi everybody,

When I execute hashcat on a single hash with this command :
./hashcat64.bin -a 3 -m 0 8743b52063cd84097a65d1633f5c74f5 ?a?a?a?a?a?a?a -w 3

I have a speed of 4273.9 MH/s

But, when i execute hashcat on a file hash with this command :
./hashcat64.bin -a 3 -m 0 example0.hash ?a?a?a?a?a?a?a -w 3

I have a speed of 2617.2 MH/s

Is it normal ? 

Thanks