toptee

Just gave OptiPNG for a spin and sharing my result, just being objective: Test image, 5280z1150z24BPP, saved in irfan PNG Q6: 989KB After OptiPNG, -O5: 900KB webp, lossless: 542KB webp, Q75: 258KB jpq Q75: 491KB (webp Q75 much better image quality)

What fingerprint reader was this?

(But I must admit that arc use almost 1GB memory)

Did try that, only improve slightly...still nothing close to the arc result.

A long forgotten archiver: free-arc produce impressing results. It's not maintained for the last 10 years but still overrun by fare any other compressor this day, at least for data like SQL backup files (.bak) or KVM/QEMU VM .qcow2 files. Example: 512 MB SQL bak file: arc: 26,7MB, 9,17 sec 7z: 36,6MB, 94,00 sec Would love to see 7zip got some of this magic The archives are made using this method, filter and algorithm: "1 rep:96mb+exe+delta+4x4:lzma:96mb:fast:32:mc4" (see attachment) Version 0.67...

https://7-zip.org/a/7z2201-src.tar.xz

Found something here: https://www.7-zip.org/a/7z2201-linux-arm.tar.xz https://www.7-zip.org/a/7z2201-linux-arm64.tar.xz https://www.7-zip.org/a/7z2201-linux-x64.tar.xz https://www.7-zip.org/a/7z2201-linux-x86.tar.xz But the URL's doesn't seem to be published anywhere on sourceforge.net or 7-zip.org :-/