Clock problem please watch my block and solve it

Discuss
#1

blocks (3)

I set the timer interval 1ms, so in my block, every 1 sc should be generated 1000 number but I got only 50 per sc why?

#2

It will be as fast as the function you call and your CPU clock.

#3

smartphones can’t do all that in 1ms that’s just too fast but you can use system time

#4