This is to help all you homeboiz on how to lag less.
This is really increase your performance by a TON, so read carefully.
Getting the optifine mod really helps you out too.
VIDEO SETTINGS:
Render Distance: 2 chunks
Graphics: fast
Vsync: Off
Max Frames: Unlimited
Brightness: Bright
Fog: Off
Chunk loading: Smooth
View bobbing: On/off (I keep off)
Advanced OpenGL: Fast
Quality and Performance, make everything off
(dont turn off the things that you dont know about, as it might mess up your multiplayer.
Animations: all off
Details: Fast/Off (If fast is possible use fast)
These are what I play on, as they may not be enjoyable, they at least help my acer laptop give me a somewhat enjoyable time on minecraft. xD
CLIENT SETTINGS:
Go to launcher
Go to edit profile
Turn on JVM settings
Read carefully now
Where it says -Xmx1G
It stands for gigs of ram dedicated to the game.
Check your computer for how much ram you have, and then put in however much of that you want to
Put more ram in by editing the -Xmx1G to for example -Xmx3G
(Preferably half of it, not the whole thing, because that may crash your computer.)
You shouldn't really mess with anything else in the launcher, as it might mess up the game.
Also, if allocating more ram to the game that way doesn't work, try using M instead of G.
1024 M = 1 G
2048 M = 2 G
3072 M = 3 G
So on and so fourth, for every 1 G you want to add just put 1024 M.
It will look like this: -Xmx2048M
Well, that's about it for this tutorial. If you have any questions ask in the comments below and I'll answer them to my fullest extent of knowledge (On this subject that is). Hope this helps you guys out!