Performance and resource consuming if build redis local in every web app server

When use one worker pool
There are any option:
1) redis(memcache)... local in memory save work data
=> SLOW, resource consuming for every webapp server to build redis
2) redis remote save worker data
=> VERY SLOW, but  independent from web app

3) global variable golang save work's data
=>> very very fast

share experiences and best practice of you for problem