Minecraft Forums

I can't use it. it says " Error: Could not create Java Virtual Machine
                                  Error: A fatal exception has occurred. Program will exit."

 

Problem solved!

 

Use this!

 

Quote from Lupadim

Thank you, but some arguments will keep the game from running. I found out that the following arguments may cause the game to not boot:

OptimizeStringConcat
UseCompressedOops

All else seemed to work. After testing, I got a nice FPS boost of 15 FPS, thanks!

If you guys have problems, try that!

Bump.

Bump, I need some more feedback on this so i can continue updating the thread guys, Thanks

Not bad. Went from 32fps with 102 mods and SUES shaders to 36fps in the same spot.

13% improvement is very feelable.

Byr the way Id suggest you ahve 2-3 differant version of this. One for lowened, mid, and highend system. Maybe 512-1GB RAM 1-2core. 2-4GB 2-4 core, and a 8+ GB 4core version.

Quote from CowSaysMoo

By the way Id suggest you ahve 2-3 differant version of this. One for lowened, mid, and highend system. Maybe 512-1GB RAM 1-2core. 2-4GB 2-4 core, and a 8+ GB 4core version.

It'd be hard to do since I don't have any other system to test it on.

I get the Error "Java Could not Create Virtual Machine

Quote from daftpunkguy

I don't understand how you "right click" on minecraft and find the option to "run with graphics processor" where exactly do you right click on minecraft?

For me, right-clicking off the taskbar, start menu, or desktop the option will not come up. I have to open up Windows Explorer and find the executable file from the appropriate area. Idk, if that's your problem, but I just wanted to throw it out there.

Not bad, but there are a few commands that cause issues with some setups. On mine, those are -XX:+UseInlineCache and -XX:+UseAggressiveOps, and possibly -XX:+UseInterpreter. If you want a minimalist version of this setup, with just memory optimizations, this should work for anybody and reduce lag spiking when loading a chunk:
-Xmx(2/3 of total RAM)
-Xmn(3/8 of Xmx) (these two set the maximum space and the space before a minor garbage collection/lag spike)
Then, add -XX:+UseConcMarkSweepGC which is the better Garbage collector for avoiding fps lag.
Finally, to squeeze a bit more out, use the optimizations (high risk, high return):
-XX:+UseAggressiveOps (optimize at all costs)
-XX:+UseInterpreter (read minecraft line by line instead of saving it all to memory; faster execution)
-XX:+OptimizeStringConcat (optimize putting two sentences together; should yield small boost with text displayed)
-XX:+UseFastAccessorMethods (optimize data retrieval; should yield HUGE returns for games like minecraft)

Aside from that, I don't recall off the top of my head, but those alone will yield a decent boost without going overboard.

Tried this on a relatively high-end PC, but with XMX-2G instead, solved my inexplicably low fps issue!

From 30fps back up to 120fps (4X)

And with shaders, from 25fps back up to 50fps (2X)

On versions 1.7.10 and also tested on 1.8's snapshot 14W31a

I know this thread is very old now, but thanks so much!

Quote from TheCookieMonsta»

Failed to load class Xmx420, exited with bad login.
I'm asuming I have to upgrade to JRE 8?

Really? 420?

Thanks for this! Now, I get more FPS! This is really needed for my large modpack!

Again, THANKS FOR THIS!

P.S. - Can you add more parameters?

P.P.S - Do you think you know more mods that adds / supports / fixes FPS?

I would recommend adding fastcraft to your list of mods to help fps plus for minecraft 1.7.10, which requires forge. Forge itself also helps with fps.

OMG SO MUCH INCREASE!!! FROM 20 FPS TO 100+ FPS THANKS

Not sure if anyone is still replying to this thread but I would like to get some help increasing my FPS for modded Minecraft. I'm using a 3 year old laptop with a i5-2450M 2.5 GHz processor. It has 2 cores and 4 threads. Intel® HD Graphics 3000 all with the latest drivers and the latest Java installed. I was wondering what java arguments I should use because anytime that I play modded my FPS goes anywhere from 30-33 all the way down to 10 and most times 1 or 0. I have 6 GB of RAM on here and so far the most I have been able to allocate is 2.5 GB of RAM. I have not touched any of the arguments that the Curse Voice client automatically puts into the profile/instance but I was hoping that someone could possibly help me with this.

Arguments on launcher:

Arguments on Regular Minecraft launcher that I had been using for a while but didn't see much of an improvement:

If there is someone who could possibly help me here I would be very greatful.