Prepare Profiling with Sentry

Gemfile

@@ -55,7 +55,8 @@ gem 'zxcvbn-ruby', require: 'zxcvbn'
 
 # Error Tracing
 gem 'mnemosyne-ruby'
-gem 'sentry-rails'
+gem 'stackprof' # Must be loaded before the Sentry SDK.
+gem 'sentry-rails' # rubocop:disable Bundler/OrderedGems
 gem 'sentry-ruby'
 
 group :development do

Gemfile.lock

@@ -271,7 +271,7 @@ GEM
     pagedown-bootstrap-rails (2.1.4)
       railties (> 3.1)
     parallel (1.23.0)
-    parser (3.2.2.0)
+    parser (3.2.2.1)
       ast (~> 2.4.1)
     pg (1.5.1)
     prometheus_exporter (2.0.8)
@@ -290,7 +290,7 @@ GEM
     pundit (2.3.0)
       activesupport (>= 3.0.0)
     racc (1.6.2)
-    rack (2.2.6.4)
+    rack (2.2.7)
     rack-mini-profiler (3.1.0)
       rack (>= 1.2.0)
     rack-proxy (0.7.6)
@@ -357,9 +357,9 @@ GEM
       rspec-mocks (~> 3.12.0)
     rspec-collection_matchers (1.2.0)
       rspec-expectations (>= 2.99.0.beta1)
-    rspec-core (3.12.1)
+    rspec-core (3.12.2)
       rspec-support (~> 3.12.0)
-    rspec-expectations (3.12.2)
+    rspec-expectations (3.12.3)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-github (2.4.0)
@@ -422,10 +422,10 @@ GEM
       rubyzip (>= 1.2.2, < 3.0)
       websocket (~> 1.0)
     semantic_range (3.0.0)
-    sentry-rails (5.8.0)
+    sentry-rails (5.9.0)
       railties (>= 5.0)
-      sentry-ruby (~> 5.8.0)
-    sentry-ruby (5.8.0)
+      sentry-ruby (~> 5.9.0)
+    sentry-ruby (5.9.0)
       concurrent-ruby (~> 1.0, >= 1.0.2)
     set (1.0.3)
     shakapacker (6.6.0)
@@ -466,6 +466,7 @@ GEM
       activesupport (>= 5.2)
       sprockets (>= 3.0.0)
     ssrf_filter (1.1.1)
+    stackprof (0.2.25)
     telegraf (2.1.1)
       influxdb
     temple (0.10.0)
@@ -586,6 +587,7 @@ DEPENDENCIES
   slim-rails
   sorcery
   sprockets-rails
+  stackprof
   telegraf
   terser
   tubesock

config/initializers/sentry.rb

@@ -4,6 +4,8 @@ Sentry.init do |config|
   config.send_modules = true
   config.include_local_variables = true
   config.breadcrumbs_logger = %i[sentry_logger monotonic_active_support_logger http_logger]
+  # Enable Profiling: https://docs.sentry.io/platforms/ruby/guides/profiling/
+  # config.profiles_sample_rate = 1.0
 
   # Set tracesSampleRate to 1.0 to capture 100%
   # of transactions for performance monitoring.