Is there an equivalent to C's memcpy?

Hey there!

What is the most efficient way to copy the content of s into d?
Is there an equivalent to C's memcpy?

(let ((s "hello world")
      (d (make-string 50)))
  ;; What is the most efficient way to copy the content of s into d?
  ;; Is there an equivalent to C's memcpy?
  )

Start with COPY-SEQUENCE; it is commonly optimized.

For reading files, try this.

replace is what I was looking for.

A word of warning: in my experience, replace can be slower than just concatenating new strings. Use your profiler.