7zip extraction doesn't seem to use multithreading by default.

Bioruebe / UniExtract2

Universal Extractor 2 is a tool to extract files from any type of archive or installer.

GNU General Public License v2.0

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7zip extraction doesn't seem to use multithreading by default. #94

Open ejohb opened 6 years ago

ejohb commented 6 years ago

It's very slow for me, and uses a single core. Should add -mmt=<x> to command line by default.

Juesto commented 5 years ago

Should be automatic....

Bioruebe commented 4 years ago

I'm not an expert in terms of 7zip, but as far as I know the use of multiple cores depends on the compression algorithm. I would expect 7z to be smart enough to enable multithreading automatically, but I'm not even sure if the option even affects decompression.

If someone wants to do some testing, feel free to post your findings here :)

vatterspun commented 4 years ago

A somewhat old SF thread that may be informative: https://sourceforge.net/p/sevenzip/discussion/45797/thread/136f029b/