* Memoize stats instance

* Create more indicative helpers for stats
* Update example for Stats API

examples/sinkiq.rb

@@ -19,8 +19,9 @@ class SinatraWorker
 end
 
 get '/' do
-  @failed = Sidekiq.info[:failed]
-  @processed = Sidekiq.info[:processed]
+  stats = Sidekiq::Stats.new
+  @failed = stats.failed
+  @processed = stats.processed
   @messages = $redis.lrange('sinkiq-example-messages', 0, -1)
   erb :index
 end

lib/sidekiq/web.rb

@@ -34,20 +34,16 @@ module Sidekiq
         end
       end
 
-      def processed
-        Sidekiq::Stats.new.processed
+      def stats
+        @stats ||= Sidekiq::Stats.new
       end
 
-      def failed
-        Sidekiq::Stats.new.failed
+      def scheduled_job_count
+        Sidekiq::ScheduledSet.new.size
       end
 
-      def zcard(name)
-        Sidekiq.redis { |conn| conn.zcard(name) }
-      end
-
-      def enqueued
-        Sidekiq::Stats.new.enqueued
+      def retry_job_count
+        Sidekiq::RetrySet.new.size
       end
 
       def retries_with_score(score)

web/views/_summary.slim

@@ -1,19 +1,19 @@
 ul.unstyled.summary
   li
-    span.count #{number_with_delimiter(processed)}
+    span.count #{number_with_delimiter(stats.processed)}
     span.desc  Processed
   li
-    span.count #{number_with_delimiter(failed)}
+    span.count #{number_with_delimiter(stats.failed)}
     span.desc  Failed
   li
     span.count #{number_with_delimiter(workers.size)}
     span.desc  Busy
   li
-    span.count #{number_with_delimiter(zcard('schedule'))}
+    span.count #{number_with_delimiter(scheduled_job_count)}
     span.desc  Scheduled
   li
-    span.count #{number_with_delimiter(zcard('retry'))}
+    span.count #{number_with_delimiter(retry_job_count)}
     span.desc  Retries
   li
-    span.count #{number_with_delimiter(enqueued)}
+    span.count #{number_with_delimiter(stats.enqueued)}
     span.desc  Enqueued