I've been using res-independent-scanlines.glsl shader with cnc-ddraw to play old windows games, it's my favorite shader and it works great! But running the shader from ShaderGlass the performance is horrendous.
I don't know if it's because it's a slang shader or my pc is old (using xeon cpu with ddr3) or both, or it needs optimizations for older cpus.
Are there optimizations planned for older pcs or any advice on how to make it perform better?