Use new rails-performance system stats

Gemfile

@@ -160,11 +160,11 @@ gem "omniauth_openid_connect", "~> 0.8.0"
 gem "sidekiq-cron", "~> 2.0"
 
 group :development, :production do
+  gem "sys-cpu", "~> 1.1"
+  gem "get_process_mem", "~> 1.0"
   gem "rails_performance", "~> 1.4"
   gem "redis-namespace"
 end
 
 gem "pghero", "~> 3.6"
 gem "pg_query", "~> 5.1"
-
-gem "get_process_mem", "~> 1.0"

Gemfile.lock

@@ -687,6 +687,8 @@ GEM
       attr_required (>= 0.0.5)
       faraday (~> 2.0)
       faraday-follow_redirects
+    sys-cpu (1.1.0)
+      ffi (~> 1.1)
     sys-filesystem (1.5.3)
       ffi (~> 1.1)
     terminal-table (3.0.2)
@@ -826,6 +828,7 @@ DEPENDENCIES
   standard (~> 1.42.1)
   stopwords-filter2
   string-similarity (~> 2.1)
+  sys-cpu (~> 1.1)
   sys-filesystem (~> 1.5)
   translation (~> 1.41)
   tzinfo-data

config/initializers/rails_performance.rb

@@ -17,12 +17,8 @@
     # config.slow_requests_threshold = 500 # number of ms
 
     # store custom data for the request
-    config.custom_data_proc = proc do |env|
-      {
-        pid: Process.pid,
-        memory_usage: GetProcessMem.new.bytes
-      }
-    end
+    # config.custom_data_proc = proc do |env|
+    # end
 
     # config home button link
     config.home_link = "/"