[ericlaw]

The abstraction leaks because the performance characteristics are inherently impossible to mask from the higher layers.

There are other places where the abstraction leaks as well (try to add a file with a Unicode name to a Compressed Folder).

It's true that you could add more and more code to try to make the abstraction leak less.

[cryptica]

It's not impossible because the author of the article themselves admit that there are many ways to fix this. I can already think of one possible way they could speed up the copy-paste from the zip file; by waiting until all files have been copied to the file system before deleting files from the zip in one go. The fact that solutions do not require a change to the interface is a sign that this is not a problem with the abstraction.

Is it the abstraction which is forcing the files to be copied 1 byte at a time? It doesn't seem like it. It's an implementation issue. The interface allowed the plugin to have been implemented in many other ways, the implementer of the plugin just happened to go about it the wrong way.