- fix date perf test (which runs 30% faster than logstash v1.1.12)

spec/filters/date_performance.rb

@@ -21,15 +21,17 @@ describe LogStash::Filters::Date do
       }
       filter {
         date {
-          mydate => "MMM dd HH:mm:ss Z"
+          match => [ "mydate", "MMM dd HH:mm:ss Z" ]
         }
       }
       output { null { } }
     CONFIG
 
+    2.times do
       agent do
         puts "date parse rate: #{event_count / @duration}"
         insist { @duration } < max_duration
       end
     end
   end
+end