are there any overclock for ipad because my ipad is getting very slow recently and this is an annoying situation could you pls help me about that
No, I am afraid there is no way to increase the RAM or CPU power/rate of the iPad. It's not user-customizable. The only way to get more is to buy a bigger, better, faster iPad generation.
There is a way, with a jail broken iPad, to make it appear as if it is running faster. You can install tweaks to make the GUI load faster, so it seems as if it is faster. This is what y2kgtp alludes to.
But, otherwise, no, you can't do any real changes to the iPad. Sorry.
Marilyn