Z Standard Best Compression Options

[KaktoR]

Here is a old test set from me for comparison.

lolz:dtb1:mtt1:mt6:d128m:mc1023
Compressed 1 file, 512,039,065 => 174,850,394 bytes. Ratio 34.15%
Compression time: cpu 0.73 sec/real 278.94 sec = 0%. Speed 1.84 mB/s

lzma:a1:mfbt4:d256m:fb273:mc10000:lc8
Compressed 1 file, 512,039,065 => 235,985,799 bytes. Ratio 46.09%
Compression time: cpu 0.81 sec/real 96.79 sec = 1%. Speed 5.29 mB/s

4x4:b64mb:lzma:ultra:64m:bt4:fb273:lc8:mc10000
Compressed 1 file, 512,039,065 => 237,540,041 bytes. Ratio 46.39%
Compression time: cpu 0.69 sec/real 38.33 sec = 2%. Speed 13.36 mB/s

razor:128m
Compressed 1 file, 512,039,065 => 206,659,001 bytes. Ratio 40.36%
Compression time: cpu 1.44 sec/real 528.19 sec = 0%. Speed 0.97 mB/s

zstd -22 --ultra -T2
Compressed 1 file, 512,039,065 => 255,419,289 bytes. Ratio 49.88%
Compression time: cpu 0.70 sec/real 200.09 sec = 0%. Speed 2.56 mB/s

4x4:b64mb:lzma:ultra:64m:bt4:fb273:lc8:mc10000
Compressed 1 file, 512,039,065 => 237,552,373 bytes. Ratio 46.39%
Compression time: cpu 0.58 sec/real 32.19 sec = 2%. Speed 15.91 mB/s

4x4:lzma:a1:mfbt4:32m:fb273:mc10000:lc8
Compressed 1 file, 512,039,065 => 240,037,512 bytes. Ratio 46.88%
Compression time: cpu 0.58 sec/real 25.33 sec = 2%. Speed 20.21 mB/s

lolz:d32:tt1:mtt1:mt8:mc2 (pretty fast and only ~2% less ratio then my standard settings. I think this is a good choice. What about decompression speed?)
Compressed 1 file, 512,039,065 => 185,075,365 bytes. Ratio 36.14%
Compression time: cpu 0.56 sec/real 71.90 sec = 1%. Speed 7.12 mB/s

lolz:dtb1:mtt1:mt6:d128m:mc1023
Compressed 1 file, 512,039,065 => 174,726,950 bytes. Ratio 34.12%
Compression time: cpu 0.70 sec/real 279.31 sec = 0%. Speed 1.83 mB/s

Same as "lolz:d32:tt1:mtt1:mt8:mc2" but with d128
Compressed 1 file, 512,039,065 => 183,759,891 bytes. Ratio 35.89%
Compression time: cpu 0.45 sec/real 92.19 sec = 0%. Speed 5.55 mB/s