Put the summary of the bug you're having here
I get horrible lag with the new launcher on any versions. I do not have dedicated graphics card. I got 80 to 250 fps with the old launcher. now i get 5 to 35 at best. my computer is a toshiba sattelite L855-S5371.
*What I expected to happen was... minecraft would run the same speed with the new launcher.
Describe what you thought should happen here
I would not have any lag problems because i have a decent computer.
*What actually happened was... I got so much lag like i have never experienced before.
Describe what happened here
Steps to Reproduce:
1. Open minecraft with my computer.
2. start any world or server.
3. ...
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Follow thes3e steps
First update your graphic drivers from the manufacturer site
Second set system high performance
1. Click Start | Control Panel.
2. Click System and Security | Power Options.
3. Expand Hide additional plans category, select High Performance.
4. Close the dialog.
Optimize Background services
Click Start | All Programs | Accessories | Run.
Type SERVICES.MSC in the Open box.
Press ENTER.
Disable services that you don’t require.
I have found a presentation tutorial that will resolve your problem You are only required to follow the steps mentioned in the tutorial
http://www.slideshare.net/CarmenPomes/minecraft-15-lag-fix
Best of luck

Tails, It is not the same as the other reported issue because i don't have a dedicated graphics card. My computer only has intel graphics.

Relinked to MCL-767