Faster memcpy alternatives- faster alternative to memcpy?

problem ：

I have a function that is doing memcpy, but it's taking up an enormous amount of cycles. I have one in progress memcpy Function of , But it takes a lot of cycles .Is there a faster alternative/approach than using memcpy to move a piece of memory? Is there anything better than using memcpy An alternative to moving a piece of memory faster / Method ？

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Solution ：

Reference resources ： https://stackoom.com/en/question/CR2o