diff --git a/app/controllers/clients_controller.rb b/app/controllers/clients_controller.rb
index 5be3063c8..be38da997 100644
--- a/app/controllers/clients_controller.rb
+++ b/app/controllers/clients_controller.rb
@@ -1,3 +1,5 @@
+require 'benchmark'
+
 class ClientsController < ApplicationController
   include Countable
 
diff --git a/app/controllers/dois_controller.rb b/app/controllers/dois_controller.rb
index 33f517b5a..51106247d 100644
--- a/app/controllers/dois_controller.rb
+++ b/app/controllers/dois_controller.rb
@@ -37,6 +37,8 @@ def index
       else nil
     end
 
+    response = nil
+
     if params[:id].present?
       logger.info "[Benchmark] find_by_id " + Benchmark.ms {
         response = Doi.find_by_id(params[:id])
@@ -90,6 +92,7 @@ def index
         total = sample_dois.length
         total_pages = 1
       else
+        results = nil
         logger.info "[Benchmark] results " + Benchmark.ms {
           results = response.results.results
         }.to_s + " ms"
diff --git a/app/controllers/prefixes_controller.rb b/app/controllers/prefixes_controller.rb
index cc1a241c4..fb56fcffe 100644
--- a/app/controllers/prefixes_controller.rb
+++ b/app/controllers/prefixes_controller.rb
@@ -1,5 +1,6 @@
+require 'benchmark'
+
 class PrefixesController < ApplicationController
- 
   before_action :set_prefix, only: [:show, :update, :destroy]
   before_action :authenticate_user!
   before_action :set_include
@@ -137,14 +138,22 @@ def update
   end
 
   def totals
+    logger = Logger.new(STDOUT)
+
     page = { size: 0, number: 1}
-    response = Doi.query("", client_id: params[:client_id],page: page, totals_agg: true)
+    response = nil
+    logger.info "[Benchmark] prefixes totals " + Benchmark.ms {
+      response = Doi.query("", client_id: params[:client_id],page: page, totals_agg: true)
+    }.to_s + " ms"
     total = response.results.total
 
-    registrant = total > 0 ? prefixes_totals(response.response.aggregations.prefixes_totals.buckets) : nil
-
-    render json: registrant, status: :ok  
-
+    registrant = nil
+    logger.info "[Benchmark] prefixes prefixes_totals " + Benchmark.ms {
+      registrant = total > 0 ? prefixes_totals(response.response.aggregations.prefixes_totals.buckets) : nil
+    }.to_s + " ms"
+    logger.info "[Benchmark] clients render " + Benchmark.ms {
+      render json: registrant, status: :ok  
+    }.to_s + " ms"
   end
 
   def destroy
diff --git a/app/controllers/providers_controller.rb b/app/controllers/providers_controller.rb
index 6d65314cd..4dbd2b00a 100644
--- a/app/controllers/providers_controller.rb
+++ b/app/controllers/providers_controller.rb
@@ -1,3 +1,5 @@
+require 'benchmark'
+
 class ProvidersController < ApplicationController
   include Countable