Put the summary of the bug you're having here i was lagging
What I expected to happen was...:
Describe what you thought should happen here i
thought it should not lag
What actually happened was...:
Describe what happened here
Steps to Reproduce:
1...turn on secret settings
2. ...resume
3. ...Lag
Lag is not technically a bug, especially in this case. The shaders are handled by your graphics processor. If it is not able to perform well with the setting enabled, the only way you can improve it is with better hardware. Because of this, some users aren't even able to use them as their hardware doesn't support them.