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reduce cache misses on STI subclasses

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This commit is contained in:
Aaron Patterson
2011-02-03 11:12:07 -08:00
parent a5d8f0be00
commit 1a15fda021
1 changed files with 4 additions and 2 deletions
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6
activerecord/lib/active_record/base.rb
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@@ -747,12 +747,13 @@ module ActiveRecord #:nodoc:
undefine_attribute_methods
reset_column_cache
@column_names = @content_columns = @dynamic_methods_hash = @inheritance_column = nil
@arel_engine = @relation = @arel_table = nil
@arel_engine = @relation = nil
end
def reset_column_cache # :nodoc:
@@columns.delete table_name
@@columns_hash.delete table_name
@@arel_tables.delete table_name
end
def attribute_method?(attribute)
@@ -851,7 +852,7 @@ module ActiveRecord #:nodoc:
end
def arel_table
@arel_table ||= Arel::Table.new(table_name, arel_engine)
@@arel_tables[table_name] ||= Arel::Table.new(table_name, arel_engine)
end
def arel_engine
@@ -1401,6 +1402,7 @@ MSG
end
@@columns_hash = {}
@@columns = {}
@@arel_tables = {}
public
# New objects can be instantiated as either empty (pass no construction parameter) or pre-set with