increasing post process cost when choosing anti-aliasing method

hello, i’ve been working on a practicing project to improve my self with the engine.
i built a level and started noticing jittering on some of the object in the level and thats how i found out about anti-aliasing methods to fix this issue, i used TSR method for AA, and suddenly i noticed my stat unit GPU is high
53454545

i did profileGPU and thats the result i got

and when i remove the AA method the post process get lowered cost for like over the half of it right now

this is the stats with anti-aliasing method set to none
514541545

this is the profile

the question is how do i lower the post process cost with AA on, i know im still bottlenecked with the gpu and im still working on it playing with the lighting and shadows. but the post process issue is what frustrating me now

edit : i added a material to the post process for highlighting some of the important objects in the level