WARNING ! THE DEVELOPPEMENT OF THIS PIECE OF CODE HAS BEEN STOPPED DUE DO A NUMBER OF VARIABLES I WASN'T ABLE TO HAVE CONTROL ON (mainly discrepancies betwwen distros)...
Use this instead: https://github.com/serpentspirale/Java-Mods-Optimizer
Minecraft-Mods-Optimizer: The universal solution for reducing minecraft modpacks file size and ram usage.
How does this work ?
This simple shell script make use of lossy png and ogg compression to produce lighter file size.
What type of performance gain can I expect ?
Normally, Minecraft keeps an extra copy of every file it loads out of a JAR file. This wastes a ton of memory.
Since this script will create a lighter mod file, you can expect a diminution in ram usage (less copied to memory) and a faster start time, especially when you have modpack with many different textures/sounds.
In general, you should gain some performance for everything related to loading something in the assets.
You may also experience less CPU overhead when playing several sounds effects at the same time.
Side note:
At the time of writing this file, I didn't check if minecraft makes use of the stereo channel of its audio files to create a spaced sound environment. If not, then I'll optimize the audio a bit further.
Side Note 2:
You should also check out these links: 1.7.10: https://forum.feed-the-beast.com/threads/guide-how-to-run-infinity-evolved-with-1-0gb-ram-allocation.149222/
1.8-1.13: https://www.curseforge.com/minecraft/mc-mods/foamfix-for-minecraft
Final Note:
Do not share any modified mod as the official one ! And, PLEASE ! Explicitly say when the mods you share are optimized with this script.
License
This piece of software relies on a few other ones: PNGQuant; FFMPEG; ZIP/UNZIP. When using my script, you must respect the license of each of these programs.