Making Modpacks More Memory/Performance Friendly

[Abion47]

Okay, so I went through the process of making the whole mod pack thing, and it's working on the launcher and everything. Now, though, the problem is that the mod pack is causing a lot of people to have a lot of memory and performance issues. I know that now I should probably go into the config files and start trimming the fat in places like disabling or reducing the spawn rate of some things, but I don't even know where to start. Is there some mod that I should prioritize over another, or maybe some way to reduce the heap/permgen requirements for the pack? I know that it's not the number of mods that I have in the pack as there are packs out there with far more mods than I have and they work fine.

Here's the link to the modpack page: http://www.technicpack.net/modpack/details/dempaklys.175185

[Nightreaver]

check Applied Energistics config

graphics {

B:gfxCableAnimation=true

I:gfxCableMinTickRate=22

B:gfxDrivesHighDef=true

}

set setting to false or raise the tickRate

Also be careful with Rei's Minimap and lots of waypoint, the more WP you display, the more redraws are required

Edit: You can use VisualVM attached to the Client to analyse the ticks. Work together with people of slow computers to find the mod that is so performance hungry.

To do so, download VisualVM (http://visualvm.java.net/ - should be free)

- extract and run (exe is in bin folder)

- attach it to your MC game

in the monitor you can see the CPU usage and some other useful stuff

go to "Sampler" Tab, join the game/server and go to anywhere where your game starts to become slower.

Hit CPU in the sampler tab, and wait some time, eg 1 or 2 minutes, the more the better it is, but dont think more than 5 or 10 min are required.

- When you are done hit STOP and "Snapshot" in the Profiler tab.

- a new Tab will open, check Minecraft Main Thread

go to the same place like the image below, and you see the time a mod need to be executed.

Here it's net.machinemuse.powersuits so I know it's MMMPowerSuits and i can the for setting in the config file.

the second image show something going wrong here.

Barrels mod takes 22% cpu time, there the second mod (buildcraft pipes) only take 4,4%

So Barrels take 5 times more CPU-time, i removed the barrels from my base/modpack and got around 22FPS back. Its possibly a coding error.

thats the only way to identify the mods.