CUSTOM BACKGROUND BLUR SHADER FOR USING IT AS IMAGE IN CANVAS

HEYS GUYS I AM CREATING A MOBILE GAME AND I WANT TO HAVE BLUR BACKGROUND UI . AND I DONT WANT TO USE POST PROCESSING . BY USING DEPTH OF FIELD , I LOST MANY 50+ FPS. SO I WANT CUSTOM OPTIMIZED SHADER FOR MOBILE.
BTW I AM USING UNITY 2017.4.

There’s no need to use capslock.

Try this free one:

Non-free alternative: