Add derailed_benchmarks gem.

Gemfile.lock

@@ -132,6 +132,7 @@ GEM
     crass (1.0.6)
     daemons (1.4.1)
     dante (0.2.0)
+    dead_end (3.1.0)
     debug_inspector (1.1.0)
     declarative (0.0.20)
     delayed_job (4.1.9)
@@ -139,6 +140,18 @@ GEM
     delayed_job_active_record (4.1.6)
       activerecord (>= 3.0, < 6.2)
       delayed_job (>= 3.0, < 5)
+    derailed_benchmarks (2.1.1)
+      benchmark-ips (~> 2)
+      dead_end
+      get_process_mem (~> 0)
+      heapy (~> 0)
+      memory_profiler (>= 0, < 2)
+      mini_histogram (>= 0.3.0)
+      rack (>= 1)
+      rack-test
+      rake (> 10, < 14)
+      ruby-statistics (>= 2.1)
+      thor (>= 0.19, < 2)
     diff-lcs (1.4.4)
     digest-crc (0.6.4)
       rake (>= 12.0.0, < 14.0.0)
@@ -225,6 +238,8 @@ GEM
       multi_json (~> 1.11)
       os (>= 0.9, < 2.0)
       signet (>= 0.16, < 2.a)
+    heapy (0.2.0)
+      thor
     hsluv (1.0.1)
     http (4.4.1)
       addressable (~> 2.3)
@@ -262,6 +277,7 @@ GEM
       rack-contrib (>= 1.1, < 3)
       railties (>= 3.0.0, < 7)
     method_source (1.0.0)
+    mini_histogram (0.3.1)
     mini_mime (1.1.2)
     mini_portile2 (2.6.1)
     minitest (5.15.0)
@@ -389,6 +405,7 @@ GEM
       rack (>= 1.1)
       rubocop (>= 1.7.0, < 2.0)
     ruby-progressbar (1.11.0)
+    ruby-statistics (3.0.0)
     ruby-vips (2.1.4)
       ffi (~> 1.12)
     ruby2_keywords (0.0.5)
@@ -502,6 +519,7 @@ DEPENDENCIES
   daemons
   delayed_job
   delayed_job_active_record
+  derailed_benchmarks
   diff-lcs
   dotenv-rails
   dtext_rb!