Question about memcpy

Dear Sir/Ma'am Thank you for your time ,i'm a student new to linux kernel. I have a question about memcpy,i noticed that memcpy is faster in kernel than in user space for example : in a module helloworld , i use memcpy to copy a 4096B to a block of memory for like 10000 times and in user space i do the same thing,I noticed that kernel is faster than user , is it possible that in kernel when i insmod hello it can not be scheduled but in user space it will so kernel is faster? is there a possible way that a user task can run a block of code that uninterruptable? No switch ,no schedule ? Thank you !