Differences between 7-Zip 4.65 and 9.18 beta?

pretty big jump in the numbering there
I'm using 64-bit 4.65 right now and can't find a changelog anywhere to determine the difference in the newer beta version

 

The betas offer slightly better compression and faster decompression. Furthermore, they offer support for a few more container formats and resolve some extremely rare bugs in unraring files.

 

Does it still do that thing where it extracts to a temporary directory first, then moves it to the final location? I always hate that, since very large files take even longer to move than they do to decompress for some reason.

 

if you mean does 7zip work in a safe manner, doing all it can to ensure error free decompression, then yes.

When working with files and filesystems, there are some 'shortcuts' that aren't worth the time.

 

uh
how is it safer to have a useless, broken file in a temporary folder than the intended destination folder?

 

I had seen that 7-Zip had this new version in the works. But does anyone know why they're version-jumping so much? Would that I say it was marketing, but 7-Zip is free software. So the jump from 4 to 9 without anything in between strikes me as a bit odd.

 

Is J-Zip still based on 7zip?

 

I've been running 9.13 x64 for about 9 months,

changelog

 

Yes, see here

 

...because the priority is to maintain the integrity of the target system. Always. 7zip doesn't assume that it or the logged-on user has exclusive access to the system. It will start a process but always monitor it.

If it is necessary to abort the creation/extraction of a file to do so, than that is what happens.

7zip does let you specify a working folder for temp copies/extractions.

 

I don't get how it jeopardizes the integrity of the file system. If anything it's worse to put it in some hidden away by default temp folder, since most users wouldn't know where bad extractions are should they not be deleted and can add up over time.