When using a weapon with optics there is a noticeable performance decrease in the way of dropped FPS that does not seem to get better regardless how long you are in this view.
- Legacy ID
Playing in any game mode, and look through optics, notice performance decrease.
It's not non-usual for Arma.
To improve your performance try these parameters (without the "):
"-cpuCount=#Insert the number of cores your Cpu has#"
"-maxmem=#Insert the number of Ram you have#"
1GB = "-maxmem=1024"
2GB = "-maxmem=2048"
3GB = "-maxmem=3072"
4GB = "-maxmem=4096"