GZIP compression safe?

[willkuer]

Probably depends on your cpu. If you are struggling the decompression can kill you. (Single core/dual core cpu's; low STR)

But I think avih or somebody in his thread said once that it can even speed up due to better caching.

[avih]

But gzip takes about 5 times as long to compress.

Not if you use pigz (written by the author of zlib/gzip):
Windows - https://blog.kowalczyk.info/software/pig...ndows.html
Source code: http://zlib.net/pigz/

With pigz, compressing ISOs to gzip is ultra fast.

[Ryudo]

Might just give that a whirl. My ISO folder is running over 130GB now. Might be handy to compress some of these.

[sirdaniel]

Thank for explanation.
Slow HDD need to less read when file is compressed, thats advantage indeed.

Updated test
My test on MOH Frontline US
ISO: 3,15GB
CSO: 2,73GB  >>>maxcso default                       <<<very slow
CSO: 2,65GB  >>>maxcso --block=16384 --fast  <<<fast
CSO: 2,63GB  >>>maxcso --block=16384           <<<very slow
GZIP: 2,62GB  >>>pigz -9 level                             <<<fast

ISZ: 2,62GB                                                  <<<fast
GZIP: 2,60GB  >>>7zip Maximum compression    <<<reasonable speed


Latest version of pigz on github can cope now with >4GB files.

[refraction]

its best to use --block=16384 with maxcso as well, unknownbrackets recommended that setting for PS2 games.

[avih]

Latest version of pigz on github can cope now with >4GB files.

"Latest" is from 2013, before gzip ISO support was added to PCSX2. And yes, it did and does support >4G files.

[Blyss Sarania]

Thank for explanation.
Slow HDD need to less read when file is compressed, thats advantage indeed.

Updated test
My test on MOH Frontline US
ISO: 3,15GB
CSO: 2,73GB  maxcso default                       very slow
...
...
GZIP: 2,60GB  7zip Maximum compression    reasonable speed

Wait you are saying default CSO was slower than 7zip gzip? Dafuq? Gzip was massively slower for me. As I said gzip was about 5 times slower when I ran the tests on my FX6300 @4.6Ghz. Yes I know it's not the best STR CPU but till it shouldn't be that much different. Hmmm.

Anyway I didn't know about pigz. Good stuff. My ISO folder is up to a whopping 178GB. If only I could be arsed to compress it XD

Also somehow the < > signs in that quote broke it for me and made my reply appear in it like the /quote wasn't there. Hmm.

[Nobbs66]

Uhh Blyss, you posted inside a quote.

[Blyss Sarania]

Nope, I didn't. See the edit and also http://forums.pcsx2.net/Thread-Mybb-upgr...#pid490968

Because I'm a mod I have HTML permissions and the less than and greater than in the quote was trying to be parsed as a tag and rekt the post.

[Nobbs66]

Ahh, that's what it was.