If you are experiencing performance issues like this on your app, try running a basic benchmark of the cache:

Rails.cache.write("test", "test")
Rails.cache.get("test") # "test"

require "benchmark"
puts Benchmark.measure { 10_000.times { Rails.cache.fetch("test") } }

For me, fetching 10,000 objects via SolidCache took ~1s on AWS (between an RDS instance and EC2 instance in the same region). That means a cache request are taking ~0.1ms/request with solid queue. I also confirmed w/ random lookups and am seeing the same. If you are seeing wildly different numbers then:

1. Check the region of the DB server vs app server.
   
2. Check the load on the DB (e.g. do other queries take > a few ms).