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I'm a fan of cleaning, I like to clean my room, my stomach, my mind and my hard drive.
That's why I love 7-zip so much, it gives me a feeling of order and tidiness in my files. thx 4 dis.
But how can I see which compression level an archive has?
Sometimes I can't be sure which I used for a certain archive or when I download 7zip files I don't know if it was compressed with "normal" or "ultra".
Is there a way to find this out except uncompressing it and recompress it with ultra just to be sure?
There is no such information in 7z file.
But there are some properties that can show used level.
1) If there are DLL/EXE files, then 7z uses
- BCJ method for normal/fast
- BCJ2 method for maximum/ultra
2) You can look the value of dictionary size (if size of file set is big):
- Normal = 16 MB
- Maximum = 32 MB
- Ultra = 64 MB