Reduce array allocation when `where` with passed hash

In most case `where` is called with passed hash. In the case
initializing `binds` is unnecessary.

1 files changed, 1 insertions, 3 deletions

diff --git a/activerecord/lib/active_record/relation/where_clause_factory.rb b/activerecord/lib/active_record/relation/where_clause_factory.rb
index dc00149130..1e7deeffad 100644
--- a/activerecord/lib/active_record/relation/where_clause_factory.rb
+++ b/activerecord/lib/active_record/relation/where_clause_factory.rb
@@ -7,8 +7,6 @@ module ActiveRecord
       end
 
       def build(opts, other)
-        binds = []
-
         case opts
         when String, Array
           parts = [klass.send(:sanitize_sql, other.empty? ? opts : ([opts] + other))]
@@ -26,7 +24,7 @@ module ActiveRecord
           raise ArgumentError, "Unsupported argument type: #{opts} (#{opts.class})"
         end
 
-        WhereClause.new(parts, binds)
+        WhereClause.new(parts, binds || [])
       end
 
       protected