Optimize log subscribers to check if the log level is sufficient before performing an operations.

1 files changed, 6 insertions, 4 deletions

diff --git a/activerecord/lib/active_record/log_subscriber.rb b/activerecord/lib/active_record/log_subscriber.rb
index a25f2c7bca..ca79950049 100644
--- a/activerecord/lib/active_record/log_subscriber.rb
+++ b/activerecord/lib/active_record/log_subscriber.rb
@@ -1,11 +1,13 @@
 module ActiveRecord
   class LogSubscriber < ActiveSupport::LogSubscriber
+    IGNORE_PAYLOAD_NAMES = ["SCHEMA", "EXPLAIN"]
+    
     def self.runtime=(value)
-      Thread.current["active_record_sql_runtime"] = value
+      Thread.current[:active_record_sql_runtime] = value
     end
 
     def self.runtime
-      Thread.current["active_record_sql_runtime"] ||= 0
+      Thread.current[:active_record_sql_runtime] ||= 0
     end
 
     def self.reset_runtime
@@ -24,9 +26,9 @@ module ActiveRecord
 
       payload = event.payload
 
-      return if 'SCHEMA' == payload[:name]
+      return if IGNORE_PAYLOAD_NAMES.include?(payload[:name])
 
-      name  = '%s (%.1fms)' % [payload[:name], event.duration]
+      name  = "#{payload[:name]} (#{event.duration.round(1)}ms)"
       sql   = payload[:sql].squeeze(' ')
       binds = nil