[libc-commits] [libc] [libc] replace for loops with a call to memcpy in File (PR #165219)

[Schrodinger ZHU Yifan via libc-commits]

https://github.com/SchrodingerZhu approved this pull request.

LGTM. As a side note, there are also other similar patterns in old code. 

https://github.com/llvm/llvm-project/pull/165219