Hangs on large files

[Cobertos]

Reported in #20 (comment) and can confirm

It looks like the extractor is hanging on large files (on the extracting portion specifically). A 330MB package takes 660 seconds (exe) and 864 seconds (python -m) vs 8 seconds in v1.0.0.

Workaround is to use v1.0.0 if you want it fast and trust your .unitypackage

[Cobertos]

I believe this was when switching to tarsafe instead of tarfile as tarsafe does a iteration over names which was a previous source of slowness

Ideally tarsafe would need to be more performant... but I don't think Python gives any better way to check the tar before iteration.

[Cobertos]

I'm thinking:

1. Add an --unsafe flag to use tarfile instead of tarsafe
2. Add a print message right before extraction like Extraction checks the security of every .tar file entry. To speed up, add --unsafe if you trust your .unitypackage is not malicious

[Cobertos]

@catfag any thoughts maybe?

[CrackerHax]

Yeah this tool is super slow

[OneManMonkeySquad]

Having some output, either progress or just "working on it..." would help a lot

[kotori2]

For me it is 58 seconds for a 2.2MB file.