And here I was thinking the author must have been using a higher level language. I remembered reading this blog[0] where the author stated that the worst case s

And here I was thinking the author must have been using a higher level language. I remembered reading this blog[0] where the author stated that the worst case scenario for an insertion at the beginning of a 2mb file only took 2ms on an old laptop while using an array as the data structure. I believe the author was using Zig here. [0]: https://www.scattered-thoughts.net/writing/focus-text/ https://www.scattered-thoughts.net/writing/focus-text/