All the tests have been done under version 4.25 of unreal engine, and they have been tested independently.
All values are indicative, the texture setting and the number of depth test have a big impact on the performance.
Distance To Camera : 0.03ms
Center HighLight : 0.001ms
LensReflection : 0.04ms
Occlusion
Simple Occlusion : 0.01ms
Fade Occlusion ( 6*4 test = 28 Test ) : 0.32ms
Fade Occlusion ( 12*8 Test = 104 Test ) : 1.34ms
Per Test : 0.012ms
Flare ( 2048x2048 RGBA 16f , Effect mipmap )
Single Flare : 0.03ms
Double Flare : 0.035ms
Ghost ( 512x512 RGBA 16f , Effect mipmap )
SimpleGhost ( 8 ghost ) : 0.10ms
SimpleGhost ( 32 ghost ) : 0.43ms
Per Ghost : 0.013ms
Advanced Ghost ( 8 ghost ) : 0.20ms
Advanced Ghost ( 32 ghost ) : 0.87ms
Per Ghost : 0.026ms
LightShaft
LightShaft ( 8 sample ) : 0.23ms
LightShaft ( 32 Sample ) : 0.76ms
Per Sample : 0.025ms