Fixes #36898 - add rack-mini-profiler

Author: m-bucher

bundler.d/profiling.rb

@@ -0,0 +1,9 @@
+group :development do
+  gem 'rack-mini-profiler'
+
+  # For memory profiling
+  gem 'memory_profiler'
+
+  # For call-stack profiling flamegraphs
+  gem 'stackprof'
+end

config/initializers/rack_mini_profiler.rb

@@ -0,0 +1,7 @@
+if defined? Rack::MiniProfiler
+  # enable profiling for all pages; per-default it is disabled on production-env
+  Rack::MiniProfiler.config.authorization_mode = :allow_all
+
+  # enable additional profiling-features
+  Rack::MiniProfiler.config.enable_advanced_debugging_tools = true
+end