PERF: fewer objects, short circuit unless necessary

1 files changed, 6 insertions, 3 deletions

diff --git a/lib/arel/algebra/relations/relation.rb b/lib/arel/algebra/relations/relation.rb
index eeb5918f4b..97aa779926 100644
--- a/lib/arel/algebra/relations/relation.rb
+++ b/lib/arel/algebra/relations/relation.rb
@@ -38,8 +38,11 @@ module Arel
       end
     end
 
-    def to_sql(formatter = Sql::SelectStatement.new(self))
-      formatter.select compiler.select_sql, self
+    def to_sql(formatter = nil)
+      sql = compiler.select_sql
+
+      return sql unless formatter
+      formatter.select sql, self
     end
 
     def christener
@@ -76,7 +79,7 @@ module Arel
     end
 
     def from_clauses
-      sources.blank? ? table_sql(Sql::TableReference.new(self)) : sources
+      sources.empty? ? table_sql : sources
     end
 
     def where_clauses