Need a lazy way to iterate files

[yanex]

UnrarKit currently returns info about all files in an archive as a NSArray. It is terribly inefficient in case if the archive contains lot of files.
There should be a way to iterate files lazily using an iterator.

[abbeycode]

Interesting – I never considered that. The Unrar library definitely encourages the all-upfront approach. What sort of efficiency is problematic for you (time, memory, etc.)?

[yanex]

Both time and memory.
The biggest issue is that you will get OOM crashes if you have a lot of files inside the archive. Java had exactly the same problem in https://docs.oracle.com/javase/7/docs/api/java/io/File.html#listFiles() until it was completely fixed in the new Path API (which utilizes the visitor approach).
The other problem is that if I want to find a particular file inside an archive I have to firstly preload the whole list of names.

[abbeycode]

@yanex I added this in the lazy-file-iteration branch, if you'd like to give it a shot. I'll merge into the v2.9 branch for release if it works for you, or after we refine it.

[abbeycode]

@yanex Have you had a chance to take a look?

[yanex]

Sorry for the late answer :(
Yes, the new way looks much better to me than just an NSArray. Good job! 👍

[abbeycode]

This has been merged for release in v2.9. Look for it in the next beta release (beta 11)